纳米结构

Abstract(#br)We report characterization of polydimethylsiloxane (PDMS) pervaporation membranes prepared from various conditions using the small-angle neutron scattering (SANS). The PDMS membranes were prepared by cross-linking reactions between hydroxyl terminated polydimethylsiloxane (HPDMS) and polymethylhydrosiloxane with pendant hydride (PHMS). The radius of gyration ( R g ) of HPDMS and PHMS polymer chains determined from the SANS data analysis is found to be similar with the size of about 12\u003cce:hsp sp=\"0.25\"/\u003eÅ.

Abstract(#br)Preparation of a high flux poly(dimethylsiloxane) (PDMS) membrane for separation of organics from water by pervaporation has been a challenging task. For this, the membrane should be as thin as possible since the productivity flux is inversely proportional to the membrane thickness. In an attempt to understand the relationship between the membrane structure and flux, the membranes of different thickness varying from about 0.2 to 150\u003cce:hsp sp=\"0.25\"/\u003eμm were prepared and studied.

Abstract(#br)Flexible surface enhanced Raman scattering (SERS) substrate would offer a highly sensitive and rapid means for detecting ultra-low concentration of analytes on an irregular surface, enabling its arising applications in wearable and wipeable devices. In this study, we launched a transfer printing method to fabricate a flexible and low cost SERS substrate with an ordered nanostructure.

Abstract(#br)A process to fabricate superhydrophobic surfaces on metals and polymers is presented. Using high speed femtosecond laser pulses, surface structures have been created on metal surfaces and transferred onto Polydimethylsiloxane (PDMS) to achieve superhydrophobic surfaces. Various surface micro and nano structures are presented and their wetting properties are discussed. Water contact angles of over 150° with a roll off angle of less than 5° were achieved on the textured copper and PDMS surfaces.

Monodisperse and water‐soluble lanthanide (Ln\u003csup\u003e3+\u003c/sup\u003e)‐doped Y(Gd)VO\u003csub\u003e4\u003c/sub\u003e nanocrystals (NCs) have been successfully synthesized by a fast, facile, and environmentally friendly microwave‐assisted route with poly(acrylic acid) as the surfactant.

Abstract(#br)In this study, TiO 2 nanorods are grown on a flexible Polydimethylsiloxane (PDMS) substrate using the hydrothermal technique. The morphological, structural, compositional, optical properties and pressure sensing are investigated in detail by FESEM, XRD, EDX, UV–visible spectrophotometer, and piezoelectric studies. XRD demonstrates the pure rutile phase with a tetragonal structure is formed from deposited TiO 2 thin film.

最近，人们对三维( 3D )多孔泡沫进行了研究，但在纳米级的比表面积和可伸展性方面还需要进一步的提高，以用于电子和能源的应用。本文报道了一种在三维聚二甲基硅氧烷( PDMS )聚合物泡沫内部的压杆表面形成量身定制的起皱结构的一般策略。通过氧等离子体处理在3D泡沫的支柱上产生可控的皱纹，在单轴预拉伸的3D PDMS泡沫上形成PDMS的双层表面，随后发生松弛。经等离子体处理1 h，预拉伸40 %后，起皱的3D泡沫与原始的3D PDMS泡沫相比，比表面积和拉伸性能分别提高了60 %和75 %以上。为了证明其在性能上的适用性，皱纹的3D泡沫上涂复导电材料制备超级电容器。由此得到的超级电容器表现出更高的储能容量( 8.3倍)，在高达50 %的拉伸下很好地保持了储能容量。