Journal of Physical Chemistry C
·
2020
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IF 4.189
Xuan Yue,Xuejie Liu,Nan Yan,Wei Jiang
Self-assembly of gold nanorods (AuNRs) into hierarchically ordered superstructures is a prerequisite for the fabrication of functional materials and devices. Although 1D linear and 2D sheetlike ordered arrays of AuNRs have been successfully constructed, organizing AuNRs into ordered arrays on 3D spherical surfaces is still quite challenging because of the difficulty in controlling the orientation of anisotropic AuNRs on curved surfaces. Here, a facile yet robust emulsion interface self-assembly strategy is reported to obtain well-defined colloidosomes with highly ordered and oriented AuNRs through the self-assembly of polymer-tethered AuNRs at the emulsion interface, which is constructed with an external aqueous solution and an internal nonsolvent (hexadecane) as a liquid-core template. Moreover, the alignment and orientation of AuNRs can be controlled by varying the curvature of the colloidosome, the length of the AuNRs, and the molecular weight of the polymer ligands. This strategy provides a promising route to the design of hierarchical superstructures with a controlled AuNR arrangement and orientation.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
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IF 7.145
Mingxian Liu,Rui He,Jing Yang,Wei Zhao,Changren Zhou
Here, we used capillary tubes to evaporate an aqueous dispersion of halloysite nanotubes (HNTs) in a controlled manner to prepare a patterned surface with ordered alignment of the nanotubes . Sodium polystyrenesulfonate (PSS) was added to improve the surface charges of the tubes. An increased negative charge of HNTs is realized by PSS coating (from −26.1 mV to −52.2 mV). When the HNTs aqueous dispersion concentration is higher than 10%, liquid crystal phenomenon of the dispersion is found. A typical shear flow behavior and decreased viscosity upon shear is found when HNTs dispersions with concentrations higher than 10%. Upon drying the HNTs aqueous dispersion in capillary tubes, a regular pattern is formed in the wall of the tube. The width and spacing of the bands increase with HNTs dispersion concentration and decrease with the drying temperature for a given initial concentration. Morphology results show that an ordered alignment of HNTs is found especially for the sample of 10%. The patterned surface can be used as a model for preparing PDMS molding with regular micro-/nanostructure. Also, the HNTs rough surfaces can provide much higher tumor cell capture efficiency compared to blank glass surfaces. The HNTs ordered surfaces provide promising application for biomedical areas such as biosensors.
研究领域:
材料科学
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生物医学工程
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
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IF 5.8
Ying Li,Xiaoxiao Huang,Zexing Deng,Yiping Guo,Wenying Zhou,Liang Zhang,Fan Zhao,Changdan Gong,Yi Wu
Flexible epoxy liquid crystal dispersed membranes (ELCMs) with high thermal conductivity (TC) were successfully prepared by using high-voltage directional molding. Epoxy liquid crystal monomers (Epoxy-LC 1 and Epoxy-LC 2 ) were uniformly dispersed into flexible epoxy polymers cured by pentaerythritol tetra (3-mercaptopropionate). TC of ELCM 1 and ELCM 2 reached 1.27 W·(m·K) −1 and 2.36 W·(m·K) −1 with 30 wt% content of Epoxy-LC 1 and Epoxy-LC 2 , which were 4.5 times and 8.43 times higher than that of pure epoxy polymer, respectively. Tensile strength and elongation at break of ELCM 1 and ELCM 2 were up to 8.1 MPa, 23 % and 23.8 MPa, 46.7 %, respectively. On the one hand, the favorable results are attributed to the molecular chains’ microscopic ordered arrangement by using high-voltage directional molding. On the other hand, the more important reason is that the hydrogen-bond interactions between −C=O and –OH of molecular chains in Epoxy-LC 2 and epoxy polymer. This work offers a new way to design flexible epoxy resins and intrinsic thermal conductive polymers.
研究领域:
材料科学
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热传导工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53077
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IF 3.057
Ying Li,Changdan Gong,Zhenzhong Hou,Wenying Zhou,Chao Liu,Longgui Peng,Yi Wu,Qin Shi,Qiwei Cheng
Flexible epoxy-dispersed liquid crystal membranes (EDLC- v membranes) with high thermal conductivity were successfully prepared by using of high voltage orientation molding. Liquid crystal monomer (LCM) was uniformly dispersed into flexible epoxy polymers cured by trimethylolpropane tris(3-mercaptopropionate) (TTMP) or pentaerythritol tetra(3-mercaptopropionate) (PETMP). In-plane thermal conductivity (TC // ) of EDLC- v membranes reached to 1.47 W m −1 K −1 with LCM content of 30 wt%, which was 5.65 times higher than that of epoxy polymers without LCM (0.26 W m −1 K −1 ). In addition, the tensile strength and elongation at break of EDLC- v membranes were up to 27.9 MPa and 92.8%, respectively. The main reasons for high TC // and flexibility of EDLC- v membranes are molecular chains' ordered arrangement, crosslinking in epoxy polymers, hydrogen bond interaction, and high voltage orientation molding. This work provided a new and feasible way to prepare intrinsic high thermal conductive polymer materials, as well as flexible epoxy polymers.
研究领域:
材料科学
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热传导工程
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
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2022
·Vol. 68
·期 9
·e17795
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IF 4.167
Chongchong Chen,Xiaoli Wu,Jie Zhang,Jingjing Chen,Xulin Cui,Wenpeng Li,Wenjia Wu,Jingtao Wang
Two-dimensional lamellar membranes are promising for efficient molecule transfer, while the underlying transfer mechanism is rarely elucidated. Herein, heterostructured nanosheets are prepared by self-assembling small-sized hydrophilic cyanuric acid melamine and hydrophobic g -C 3 N 4 nanosheets. Resultant lamellar membranes show comparable affinity to polar and nonpolar solvents, allowing them to dissolve on membrane surface and diffuse through membrane channels. Results demonstrate that for lamellar membranes with distinct wettability, the permeance difference for polar solvents is originated from dissolution and diffusion processes, while that for nonpolar solvents is stemmed from dissolution process. Accordingly, corresponding equations which are suitable for heterostructured lamellar membranes are established. Importantly, polar solvents are induced to form ordered arrangement in hydrophilic nanodomains and then maintain the ordered state in hydrophobic nanodomains, affording a low-resistance transfer and high acetonitrile permeance of 1025 L m −2 h −1 bar −1 . In contrast, nonpolar solvents with disordered arrangement exhibit lower permeance than that of polar ones.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）