Preparation and optical polarization of Ag/epoxy composite films with aligned Ag nanowires

Highly conductive and transparent coatings from flow-aligned silver nanowires with large electrical and optical anisotropy

“…"# 9 !$% = 1.7, is rather small and the normalized light intensity peak at 180° is quite broad with Full-Width-at-Half-Maximum (FWHM) of approximately 92°. This result is consistent with previous studieswhere weak optical anisotropy (<2x) is observed from individual aligned nanotubes and from AgNWs in both transmission and reflection modes 10,11,46. Next, we illuminate the aligned AgNW coating with unpolarized light and measure the intensity of scattered light at = 60°; for this measurement, the angle of aligned AgNW coating, b, is varied by rotating the sample.…”

“…30,33 Prior simulation 44 and experimental 11,33,45 work explains the absorption peak at short (long) wavelength as due to the transverse When the two mechanisms are combined, we observe a much higher anisotropy than reported in earlier studies. 10,11,46 Large optical anisotropy has been shown to improve the resolution of signals such as those arise in polarization images or surface-enhanced Raman spectroscopy (SERS), 30 and large anisotropy is desirable in nanowire-based polarizers for polarization light sensors.…”

“…1,2 AgNW films, for example, are attractive candidates for transparent conductive coatings in flexible touch-screen displays, due to their high visible light transparency and tolerance to planar strain. [3][4][5] Moreover, the one-dimensional (1D) nature of these wires induces anisotropy in electrical conductivity and optical appearance, and some nanowire assemblies with anisotropic properties have been found to exhibit enhanced performance in nanocomputing devices, 6 antennas, [7][8][9] polarized-light-based sensors, 10 and surface enhanced Raman spectroscopy (SERS). 11 The performance of AgNW-based devices usually depends on the density and organization of the AgNWs.…”

“…Many methodologies for deposition and alignment of 1D nanomaterials such as nanowires or nanotubes have been explored. 10,11,[20][21][22][23][24][25][26][27][28][29] Self-assembly at oil-water-air interfaces 25 and Langmuir−Blodgett methods 30 have been used to align AgNWs. More recently, capillary-based techniques including capillary printing, 31 meniscus-dragging, 32 Hdip, 33 and bar-coating 34 have been used to create large-scale aligned or cross-aligned AgNW coatings on flat substrates.…”

Recent Advances on Nanocomposite Resists With Design Functionality for Lithographic Microfabrication

“…The morphology of NFs is also relevant in terms of their intrinsic anisotropic properties, since these can be transferred to the whole NCPR. Elongated NPs, nanorods, NWs, CNTs and others can be isotropically dispersed in the NCPRs or be aligned in a given direction for a "designed anisotropy" (Ma et al, 2014;Ushiba et al, 2014;Xiong et al, 2016). Also, the size of the NFs plays a mayor role because: 1) it determines the surface-tovolume ratio and therefore the relevance of the interface between the NFs and matrix; 2) the properties of nanoscale objects may be strongly dependent on their size, as in the case of plasmonic NPs and QDs.…”