Co-reporter:Ziquan Cao, Qing Bian, Ying Chen, Fuxin Liang, and Guojie Wang
ACS Macro Letters October 17, 2017 Volume 6(Issue 10) pp:1124-1124
Publication Date(Web):September 27, 2017
DOI:10.1021/acsmacrolett.7b00714
A robust light-responsive coating based on Janus composite particles is achieved. First, strawberry-like silica Janus particles are synthesized by the sol–gel process at a patchy emulsion interface. One side of the silica Janus particles possesses nanoscale roughness, and the other side is flat. Then, spiropyran-containing polymer brushes are grafted onto the coarse hemispherical side of the as-synthesized Janus particles, and the other flat side is modified with imidazoline groups. The light-responsive polymer brush-terminated coarse hemispherical sides direct toward the air when the Janus composite particles self-organize into a layer on the surface of epoxy resin substrate. The imidazoline groups react with the epoxy groups in the epoxy resin to form a robust smart coating. The coating can be reversibly triggered between hydrophobic and hydrophilic by UV and visible-light irradiation, which is attributed to the isomerization of spiropyran moieties. When the hydrophobic ring-closed spiropyran form is prominent, HeLa cells can be effectively captured onto the coating. After UV light irradiation, the ring-closed spiropyran form changes to the hydrophilic ring-opened zwitterionic merocyanine form, and then the captured cells are released. This work shows promising potential for engineering advanced smart biointerfaces.
Co-reporter:Yijiang Liu, Jiankang Hu, Xiaotian Yu, Xinyu Xu, Yong Gao, Huaming Li, Fuxin Liang
Journal of Colloid and Interface Science 2017 Volume 490(Volume 490) pp:
Publication Date(Web):15 March 2017
DOI:10.1016/j.jcis.2016.11.053
Two Janus-type catalysts were synthesized by selective modification and further functionalization with metal nanoparticles on one or both beads of snowman-like Janus particles. The catalytic performance of Janus-type catalysts both in homogeneous and interfacial reaction systems was systematically investigated using the reduction of nitro-compound as model reaction. The results showed that Janus-type catalysts have excellent catalytic activity in homogeneous reaction system and they are easy to recycle. Further, the Janus-type catalysts exhibited more efficient catalytic activity at emulsion interface than that of oil-water biphasic interface due to the exposed Au nanoparticles on snowman-like Janus particles offer high accessibility to reactants.The Janus-type catalyst can stabilize a water-in-oil emulsion and exhibit high catalytic activity for the reduction of nitro-compound at emulsion interface.Download high-res image (181KB)Download full-size image
Co-reporter:Qing Bo Meng, Peng Yang, Tianyang Feng, Xuyang Ji, Qian Zhang, Daliang Liu, Shuyao Wu, Fuxin Liang, Zhaoliang Zheng, Xi-Ming Song
Journal of Colloid and Interface Science 2017 Volume 507(Volume 507) pp:
Publication Date(Web):1 December 2017
DOI:10.1016/j.jcis.2017.07.097
A type of ionic liquid functionalized high-aspect-ratio Janus SiO2 nanosheets (IL-Janus nanosheets), which possesses a side terminated by imidazolin salt groups and the opposite side terminated by phenyl groups, was prepared and its emulsification performance was investigated. The surface wettability of ionic liquid functionalized side could be tailored via simple anion exchanging, giving the amphiphilic or totally hydrophobic Janus nanosheets. The influence of several parameters including surface wettability, particle concentration, oil composition, oil-water ratio as well as initial location of the nanosheets on the stability, morphology and type of the Pickering emulsions (O/W or W/O) stabilized by the amphiphilic IL-Janus nanosheets was evaluated. The research results revealed that average emulsion droplets size was decreased with increase of nanosheets concentration below a concentration value but had almost no change beyond the concentration; catastrophic phase inversion phenomenon occurred by varying volume fraction of water phase in the oil-water systems, and transitional phase inversion could be achieved by in-situ exchanging Cl− anion of the IL-Janus nanosheets with phosphomolybdate H2PMo12O40−. The responsiveness of Pickering emulsions towards phosphomolybdic acid is resulted from irreversible anion exchanging of Cl− by H2PMo12O40− and the variation of surface wettability of the nanosheets.Download high-res image (76KB)Download full-size image
Co-reporter:Yingqiang Zhang;Jun Cheng;Saina Yang;Xiaozhong Qu
RSC Advances (2011-Present) 2017 vol. 7(Issue 10) pp:5970-5978
Publication Date(Web):2017/01/16
DOI:10.1039/C6RA26743B
Efficient control of Tetranychus cinnabarinus (B.) is in challenge worldwide. Herein we report the use of an amphiphilic block copolymer, poly(ethylene oxide)-b-poly(caprolactone) (PEO–PCL), as a micellar carrier to make formulations of ricinine, a water insoluble botanical pesticide, and the tests of their physical properties and moreover the acaricidal activity on Vigna unguiculata (L). Compared to the formulations made from small molecular surfactant, e.g. Tween-80, the polymer formulations showed differentiated spreading property on T. cinnabarinus (B.) and V. unguiculata (L.) leaf surfaces, i.e. having slightly lower contact angle on the mite's integument. This contributes a relatively easy wash-off performance of the polymer formulations from the V. unguiculata (L.) leaf and meanwhile an enhanced protection to the plant in the simulated field trial. Our work thus suggests favorable characteristic of amphiphilic polymer in the future development of insecticides.
Co-reporter:Dan Xue;Ximing Song
RSC Advances (2011-Present) 2017 vol. 7(Issue 41) pp:25450-25454
Publication Date(Web):2017/05/10
DOI:10.1039/C7RA03116E
Ultrathin Janus nanodiscs with single molecular scale thickness are fabricated by self-organized sol–gel process against a patchy magnetic microsphere. Functional groups onto the patch domains can induce a favourable absorption of an amine. The morphology of Janus nanodiscs is adjusted by controlling the patchy regions on the surface of paramagnetic Fe3O4@SiO2 core/shell microspheres. The as-used patchy C8–(Fe3O4@SiO2)–PhCHO microspheres serving as templates can be easily separated from the as-formed Janus nanodiscs and reused to fabricate other Janus nanodiscs. Functional compositions such as paramagnetic Fe3O4 nanoparticles and polymers with different wettability properties are introduced onto the different regions of Janus nanodiscs to achieve magnetic Janus nanodiscs. They are used as efficient solid surfactants to stabilize emulsion.
Co-reporter:Lin Tang, Saina Yang, Fuxin Liang, Qian Wang, Xiaozhong Qu, and Zhenzhong Yang
ACS Applied Materials & Interfaces 2016 Volume 8(Issue 19) pp:12056
Publication Date(Web):May 2, 2016
DOI:10.1021/acsami.6b03208
The platelet-shaped Janus nanocages with a mesoporous silica shell are prepared. PEG moiety onto the exterior surface is responsible for good dispersity in water. The graphene sheet inside the cavity is responsible for hydrophobic performance to selectively capture hydrophobic species, and photothermal effect by NIR irradiation. As a biocompatible DOX-loaded Janus platelet delivery, HeLa cell cytotoxicity is greatly enhanced under NIR irradiation. There exists a synergetic effect between the chemotherapy and photothermal therapy.Keywords: delivery; graphene; Janus; nanocage; NIR
Co-reporter:Ying Chen;Zhen Liu;Dr. Xiaozhong Qu;Dr. Fuxin Liang; Zhenzhong Yang
Chemistry – An Asian Journal 2016 Volume 11( Issue 12) pp:1785-1788
Publication Date(Web):
DOI:10.1002/asia.201600435
Abstract
We propose a facile method to achieve paramagnetic Janus nanotubes with two compositions compartmentalized onto the interior and exterior surfaces, respectively. A sulfonated polydivinylbenzene (PDVB) nanotube is prepared by simple sulfonation of the exterior surface of a PDVB nanotube. Silica@FeOOH dual layers are sequentially grown onto the sulfonated PDVB nanotube surface. The composite nanotubes become paramagnetic after calcination and can be broken into shorter pieces under vigorous ultrasonication. After selective modification of the interior and exterior surfaces of the paramagnetic nanotubes, the nanotube shell becomes Janus in wettability. Desired hydrophobic species can be selectively captured inside the cavity. The paramagnetic Janus composite nanotubes can align into parallel chains under a magnetic field, which is self-disassembled upon removal of the magnetic field.
Co-reporter:Haili Yang, Fuxin Liang, Ying Chen, Qian Wang, Xiaozhong Qu and Zhenzhong Yang
NPG Asia Materials 2015 7(4) pp:e176
Publication Date(Web):2015-04-01
DOI:10.1038/am.2015.33
We demonstrate a one-step approach toward the large-scale fabrication of robust superhydrophobic coatings using strawberry-like hemispherical Janus particles. Hemispherical Janus particles are capable of self-organizing into a layer on substrates. Nanoscale roughness on the hydrophobic hemispherical side determines the superhydrophobic performance. The imidazolin group on the hydrophilic flat side determines the coating strength by covalent binding onto substrates via cations initiating the crosslinking of the intermediate epoxy resins. The coating can tolerate organic solvents and high water flushing speeds. If the hydrophobic side is smooth, then the coating is highly adhesive to water. This procedure can fabricate unique coatings on a diverse range of substrates with varied compositions and shapes.
Co-reporter:Yijiang Liu, Fuxin Liang, Qian Wang, Xiaozhong Qu and Zhenzhong Yang
Chemical Communications 2015 vol. 51(Issue 17) pp:3562-3565
Publication Date(Web):12 Jan 2015
DOI:10.1039/C4CC08420A
Flexible Janus nanosheets of molecular scale thickness (3.5 nm) are massively fabricated by a sol–gel process of a self-assembled monolayer of an amphiphilic silane onto a template. Groups of both sides are tuneable, and thus performance of the nanosheets, for example, is pH responsive. As a flexible solid emulsifier, the desired species can be wrapped with an individual nanosheet, which is pH triggered.
Co-reporter:Ziguang Zhao, Feiyan Zhu, Xiaozhong Qu, Qiuhua Wu, Qian Wang, Guolin Zhang and Fuxin Liang
Polymer Chemistry 2015 vol. 6(Issue 22) pp:4144-4153
Publication Date(Web):24 Apr 2015
DOI:10.1039/C5PY00267B
In this study, we develop a novel approach to fabricate pH-responsive polymeric Janus hollow spheres (JHSs) with bi-layered structures by two-step polymerization with silica particles as templates. The inner layer is the biodegradable poly(ε-caprolactone) (PCL) brush and the outer layer is cross-linked pH-responsive poly(diethylaminoethylmethacrylate) (PDEAEMA). So, these as-synthesized JHSs can selectively load oil-soluble materials into the cavities and controllably release them by changing the pH. Doxorubicin (DOX) is selected as a model drug which is loaded into the cavity of the JHSs and showed faster release at acidic pH than at physiological pH. It was revealed that the intracellular uptake of JHSs at the pH of tumorous tissues was significantly larger than that under the same conditions at the pH of the normal physiological environment.
Co-reporter:Xuyang Ji, Qian Zhang, Xiaozhong Qu, Qian Wang, Xi-Ming Song, Fuxin Liang and Zhenzhong Yang
RSC Advances 2015 vol. 5(Issue 28) pp:21877-21880
Publication Date(Web):18 Feb 2015
DOI:10.1039/C5RA02330K
Polymeric ionic liquid (PIL) functionalized Janus nanosheets are synthesized by polymerization of ionic liquid monomers onto the ATRP agent modified side of the silica Janus nanosheets. PW12O403− anion is introduced onto the PIL side through anion exchange. The PW12O403− based PIL Janus nanosheets at the emulsion interface exhibit excellent catalytic degradation of water soluble dyes for example methyl orange (MO).
Co-reporter:Ying Zhao;Ling He;Ning Tang;Song Qin;Guo-Hong Tao;Fu-Xin Liang
European Journal of Inorganic Chemistry 2015 Volume 2015( Issue 3) pp:542-551
Publication Date(Web):
DOI:10.1002/ejic.201403018
Abstract
A series of luminescent ionic liquids based on pentanitratoeuropate(III) anions combined with imidazolium cations, namely, 1,2,3-trimethylimidazolium {[MC1mim]2[Eu(NO3)5] (1)}, 1,3-dimethylimidazolium {[C1mim]2[Eu(NO3)5] (2)}, 1-ethyl-3-methylimidazolium {[C2mim]2[Eu(NO3)5] (3)}, 1-butyl-3-methylimdazolium {[C4mim]2[Eu(NO3)5] (4)}, 1-hexyl-3-methylimidazolium {[C6mim]2[Eu(NO3)5] (5)}, and 1-methyl-3-octylimidazolium {[C8mim]2[Eu(NO3)5] (6)}, were synthesized. These complexes were characterized by NMR and IR spectroscopy as well as elemental analysis. They exhibit high thermostability and wide liquidus ranges of more than 300 °C. Colorless plate crystals of 1 were isolated, and the crystal structure was determined by single-crystal X-ray diffraction [monoclinic system, C2/c space group with the cell parameters a = 21.6870(6) Å, b = 9.9807(4) Å, c = 15.0267(6) Å, β = 131.140(4)°, Z = 4]. In the [Eu(NO3)5]2– anion, the 10-coordinate EuIII ion is coordinated by five bidentate nitrate ligands and has a highly symmetrical trigonal-bipyramidal geometry. Compounds 1–6 exhibit bright red luminescence of high colorimetric purity. Only two characteristic narrow monochromatic bands, arising from the 5D07FJ (J = 1 and 2) intraconfigurational f–f transitions, were clearly observed in their emission spectra at 298 K. The intense red photoluminescence is still stable at 150 °C. These 10-coordinated EuIII complexes are of interest as potential thermally stable luminescent soft materials.
Co-reporter:Dong-mei Lv;Wei Ni;Fu-xin Liang 梁福鑫;Qian Wang
Chinese Journal of Polymer Science 2015 Volume 33( Issue 9) pp:1344-1350
Publication Date(Web):2015 September
DOI:10.1007/s10118-015-1683-2
We herein report a novel approach to fabricate poly(DVB-co-VBC) one-dimentional nanomaterials with varied composition. By adjusting the monomer DVB/VBC ratio and using inert solvents, after internal cavity of the nanotubes disappears and length of the nanotubes is decreased, thus nanorods are achieved. After quaternary ammoniation from the benzyl chloride group, the exterior surface becomes hydrophilic while the interiority preserves hydrophobic. The Janus nanorods can serve as a specific vehicle to selectively collect oils from their aqueous surroundings.
Co-reporter:Yijiang Liu;Qian Wang;Xiaozhong Qu
Science China Materials 2015 Volume 58( Issue 2) pp:126-131
Publication Date(Web):2015 February
DOI:10.1007/s40843-015-0027-4
Janus materials have witnessed fast development due to their diversified promising performances and practical applications. Compared with their spherical counterparts, Janus nanosheets have gained more concerns for their highly anisotropic shape besides chemistry. Herein, 3.5 nm ultrathin and flexible Janus nanosheets with carboxyl group terminated onto one side are fabricated by surface sol-gel process of the self-assembled monolayer of an amphiphilic silane onto the template CaCO3 particle firstly. Amine/acid composite Janus nanosheets are further derived from these carboxyl group terminated silica Janus nanosheets by selective conjugation with amine groups onto the other side. The amine/acid composite Janus nanosheets are dually pH responsive, and well dispersible in aqueous solution at both low and high pH levels. The nanosheets are aggregated forming multi-layered face-to-back superstructures at intermediate pH levels. This is originated by the opposite electrostatic interaction between the carboxyl and the amine groups. This approach can be extended to other silanes, and a huge family of Janus nanosheets is expected with tunable composition and performance.含酸酐两亲硅烷偶联剂在颗粒表面吸附形成自组装单分子膜, 可通过溶胶-凝胶法制备二氧化硅Janus纳米片. 本文通过对二氧化硅Janus纳米片选择改性在一侧偶联氨基, 制备了羧基/氨基复合的Janus纳米片. 纳米片两侧的羧基与氨基具有不同的pH值响应性, 表现出相应的荷电性质及润湿性. 二者共同作用, 引起纳米片特殊的分散和聚集行为. 在较低或较高pH水平, 纳米片表现为Janus特性, 分散良好. 在中间pH范围, 纳米片两侧羧基氨基相反电荷相互吸引导致层层组装聚集并沉淀.
Co-reporter:Qi-guang Wang;Fu-xin Liang 梁福鑫;Qian Wang
Chinese Journal of Polymer Science 2015 Volume 33( Issue 10) pp:1462-1469
Publication Date(Web):2015 October
DOI:10.1007/s10118-015-1691-2
pH responsive composite Janus cages of PS-silica-PEO are prepared using silica nanoparticles to crosslink two PAA contained di-block copolymers at an emulsion interface sequentially. Transverse channels are in situ created across the shell, which facilitates mass transfer. Shell is pH responsive owing to the presence of residual PAA chains tethered onto the silica nanoparticles. The Janus cages are capable to preferentially capture oil from their aqueous surroundings. The saturation absorption capacity is determined by pH and oil property. Other composite Janus cages are expected by extension the method using other copolymers and functional nanoparticles.
Co-reporter:Qiguang Wang;Yijiang Liu;Xiaozhong Qu;Qian Wang
Colloid and Polymer Science 2015 Volume 293( Issue 9) pp:2609-2615
Publication Date(Web):2015 September
DOI:10.1007/s00396-015-3649-x
Polymeric Janus nanosheets are synthesized by crosslinking the self-assembled monolayer formed by a reactive polymer surfactant at an oil/water interface. At low temperature, while the hydrophobic segments are frozen by the internal phase of solid paraffin, the reactive hydrophilic carboxylic acid groups exposed to the external aqueous phase can be selectively crosslinked to form an intact nanomembrane. The Janus nanosheets can be created after breaking the nanomembrane into pieces under ultrasonication during dissolution of the paraffin phase. Many approaches can be used to crosslink the nanomembrane at the interface, for example multiple amines and multivalent cationic ions. The polymeric Janus nanosheets can be easily functionalized to derive a series of composite nanosheets. The composite Janus nanosheets can serve as new solid surfactants which are responsive to pH or magnetic field.
Co-reporter:Renhua Deng, Fuxin Liang, Xiaozhong Qu, Qian Wang, Jintao Zhu, and Zhenzhong Yang
Macromolecules 2015 Volume 48(Issue 3) pp:750-755
Publication Date(Web):January 16, 2015
DOI:10.1021/ma502339s
We present a facile and versatile approach to prepare diblock copolymer based Janus nanoparticles (NPs). Diblock copolymer PS-b-P4VP can self-assemble into patchy particles with P4VP protuberances on their surface using the emulsion solvent evaporation method. After cross-linking the P4VP protuberances, Janus NPs are produced by disassembling the particles. Within the P4VP domains, other species including metallic and inorganic are preferentially grown to extend composition and functionality. The Janus NPs are amphiphilic and capable to self-organize into superstructures. The size ratio of P4VP/PS and thus the Janus balance of the NPs are tunable by changing block chain length ratio of the block copolymers.
Co-reporter:Yijing Sun, Fuxin Liang, Xiaozhong Qu, Qian Wang, and Zhenzhong Yang
Macromolecules 2015 Volume 48(Issue 8) pp:2715-2722
Publication Date(Web):April 16, 2015
DOI:10.1021/acs.macromol.5b00207
We present a facile approach toward snowman-like silica@PDVB/PS Janus particles by seed emulsion polymerization using a gelable monomer MPS against a PDVB/PS hollow particle. Individual silica bulge is protruded from the seed particle surface, whose size is tunable. The silica@PDVB Janus particles are derived after dissolution of PS, which are robust to tolerate against organic solvents. Both sides are reactive for selective modifications to grow desired materials with tunable wettability and functionality. As solid emulsifiers, the Janus balance of the particles is tunable from more hydrophobic to more hydrophilic by changing either aspect size ratio or composition of the two sides.
Co-reporter:Ziguang Zhao, Fuxin Liang, Guolin Zhang, Xuyang Ji, Qian Wang, Xiaozhong Qu, Ximing Song, and Zhenzhong Yang
Macromolecules 2015 Volume 48(Issue 11) pp:3598-3603
Publication Date(Web):May 29, 2015
DOI:10.1021/acs.macromol.5b00365
Janus composite nanosheets of PNIPAM/silica/PDEAEMA are synthesized by sequential ATRP grafting two polymers from the corresponding sides of the Janus silica nanosheets. They are dually responsive to pH and temperature since wettability of the two sides is tunable accordingly. The nanosheets can serve as a responsive solid emulsifier. Type and stability of the emulsions are triggered by simply changing pH and temperature.
Co-reporter:Hua Zhao, Fuxin Liang, Xiaozhong Qu, Qian Wang, and Zhenzhong Yang
Macromolecules 2015 Volume 48(Issue 3) pp:700-706
Publication Date(Web):January 26, 2015
DOI:10.1021/ma502421z
Conelike cross-linked PS particles are polymerized at a patchy emulsion interface. The PS particles synthesized in the dispersed paraffin phase immigrate toward the interface due to the Pickering effect. At the triple phase contact line, the particles are squeezed into cone shape under an outward convex interfacial tension mismatch. The conelike PS particles are adhered to paraffin sphere surface and synchronously protected, which allows selective modifications of the two sides. The Janus particles can self-organize into superstructures in dispersions. Robust coatings are easily fabricated from the Janus particles, whose wettability is tunable from highly adhesive for water to superhydrophobic by simply changing the size distribution of the Janus particles.
Co-reporter:Renhua Deng;Peng Zhou;Chengliang Zhang;Xiaozhong Qu;Qian Wang;Jiaoli Li;Jintao Zhu;Zhenzhong Yang
Advanced Materials 2014 Volume 26( Issue 26) pp:4469-4472
Publication Date(Web):
DOI:10.1002/adma.201305849
Co-reporter:Renhua Deng, Shanqin Liu, Fuxin Liang, Ke Wang, Jintao Zhu, and Zhenzhong Yang
Macromolecules 2014 Volume 47(Issue 11) pp:3701-3707
Publication Date(Web):May 30, 2014
DOI:10.1021/ma500331w
Janus colloidal particles with hierarchical structures are generated by phase separation of diblock copolymer polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and homopolymer poly(methyl methacrylate) (PMMA) binary blends in confined geometry. The dependence of their morphology on the copolymer composition, solvent selectivity, particle size, and polymer/aqueous solution interfacial property was investigated. By varying the particle/aqueous solution interfacial property alternately, the Janus particles exhibited a reversible morphological transformation under solvent-adsorption annealing process. In addition, by introducing 3-n-pentadecyphenol (PDP) which can hydrogen bond with P4VP to form supramolecules, the structure of the Janus particles can be well tuned. Furthermore, due to the complexation of pyridine unit with Au precursor, composite Janus particles with Au nanoparticles selectively incorporated in P4VP microdomains can be easily manipulated.
Co-reporter:Lingling Zhao, Lijun Zhu, Ying Chen, Qian Wang, Jiaoli Li, Chengliang Zhang, Fuxin Liang, Xiaozhong Qu and Zhenzhong Yang
Chemical Communications 2013 vol. 49(Issue 55) pp:6161-6163
Publication Date(Web):14 May 2013
DOI:10.1039/C3CC42505C
Janus hollow spheres, with different compositions compartmentalized onto both interior and exterior surfaces of the same shell and P25 nanoparticles encapsulated in the cavities, are synthesized by the ultrasonic spray method to selectively enrich desired reagents in a confined environment for further reaction.
Co-reporter:Haili Yang, Fuxin Liang, Xing Wang, Ying Chen, Chengliang Zhang, Qian Wang, Xiaozhong Qu, Jiaoli Li, Decheng Wu, and Zhenzhong Yang
Macromolecules 2013 Volume 46(Issue 7) pp:2754-2759
Publication Date(Web):March 18, 2013
DOI:10.1021/ma400261y
A general approach is proposed to synthesize Janus polymer/inorganic composite nanosheets. Onto the amine-group-terminated side of the Janus inorganic nanosheets, initiators are covalently bonded. By a favorable grafting from initiator-terminated side, responsive polymers, for example PDEAEMA and PNIPAM, are synthesized by controlled polymerization for example ATRP or RAFT polymerization. Stable emulsions are easily formed in the presence of the Janus nanosheets, which can be easily de-emulsified by subtle changing physicochemical parameters, for example temperature and pH.
Co-reporter:Ying Chen, Haili Yang, Chengliang Zhang, Qian Wang, Xiaozhong Qu, Jiaoli Li, Fuxin Liang, and Zhenzhong Yang
Macromolecules 2013 Volume 46(Issue 10) pp:4126-4130
Publication Date(Web):May 8, 2013
DOI:10.1021/ma4006236
Janus cages with a bilayer polymer–inorganic composite shell are synthesized by an emulsion interfacial self-organized sol–gel process followed by a polymer grafting onto the interior surface containing a vinyl group. Binary surfactants experience a phase separation to create transverse channels across the shell. The Janus cages can be functionalized by either growing responsive polymers or integrating with functional nanoparticles. They are promising in controlled loading and triggered release of desired materials under guidance.
Co-reporter:Ying Chen, Fuxin Liang, Haili Yang, Chengliang Zhang, Qian Wang, Xiaozhong Qu, Jiaoli Li, Yuanli Cai, Dong Qiu, and Zhenzhong Yang
Macromolecules 2012 Volume 45(Issue 3) pp:1460-1467
Publication Date(Web):January 19, 2012
DOI:10.1021/ma2021908
Janus nanosheets of polymer–inorganic layered composites are fabricated by crushing the corresponding Janus composite hollow spheres, which are synthesized by materialization of an amphiphilic emulsion interface with self-organized sol–gel process and subsequent polymer grafting onto the lipophilic side. The Janus composite nanosheets serve as solid surfactants to stabilize emulsion droplets, which are tolerant against solvents. Janus balance of the composite nanosheets is tunable crossing from more lipophilic to hydrophilic by alteration of polymer content. Thereafter, continuous phase of the emulsions can be inverted.
Co-reporter:Wei Ni, Fuxin Liang, Jiguang Liu, Xiaozhong Qu, Chengliang Zhang, Jiaoli Li, Qian Wang and Zhenzhong Yang
Chemical Communications 2011 vol. 47(Issue 16) pp:4727-4729
Publication Date(Web):17 Mar 2011
DOI:10.1039/C1CC10900F
Crosslinked polymer nanotubes are large scale synthesized. The method is based on fast cationic polymerization using immiscible initiator nanodroplets. Nanoporous network processed from the nanotubes is superhydrophobic, which can absorb all the tested organic chemicals forming robust gels. The nanotubes are promising in the collection of spilled organic chemicals, detoxification and water treatment.
Co-reporter:Yijiang Liu, Fuxin Liang, Qian Wang, Xiaozhong Qu and Zhenzhong Yang
Chemical Communications 2015 - vol. 51(Issue 17) pp:NaN3565-3565
Publication Date(Web):2015/01/12
DOI:10.1039/C4CC08420A
Flexible Janus nanosheets of molecular scale thickness (3.5 nm) are massively fabricated by a sol–gel process of a self-assembled monolayer of an amphiphilic silane onto a template. Groups of both sides are tuneable, and thus performance of the nanosheets, for example, is pH responsive. As a flexible solid emulsifier, the desired species can be wrapped with an individual nanosheet, which is pH triggered.
Co-reporter:Wei Ni, Fuxin Liang, Jiguang Liu, Xiaozhong Qu, Chengliang Zhang, Jiaoli Li, Qian Wang and Zhenzhong Yang
Chemical Communications 2011 - vol. 47(Issue 16) pp:NaN4729-4729
Publication Date(Web):2011/03/17
DOI:10.1039/C1CC10900F
Crosslinked polymer nanotubes are large scale synthesized. The method is based on fast cationic polymerization using immiscible initiator nanodroplets. Nanoporous network processed from the nanotubes is superhydrophobic, which can absorb all the tested organic chemicals forming robust gels. The nanotubes are promising in the collection of spilled organic chemicals, detoxification and water treatment.
Co-reporter:Lingling Zhao, Lijun Zhu, Ying Chen, Qian Wang, Jiaoli Li, Chengliang Zhang, Fuxin Liang, Xiaozhong Qu and Zhenzhong Yang
Chemical Communications 2013 - vol. 49(Issue 55) pp:NaN6163-6163
Publication Date(Web):2013/05/14
DOI:10.1039/C3CC42505C
Janus hollow spheres, with different compositions compartmentalized onto both interior and exterior surfaces of the same shell and P25 nanoparticles encapsulated in the cavities, are synthesized by the ultrasonic spray method to selectively enrich desired reagents in a confined environment for further reaction.
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