Electrically conducting film of silver sub-micron particles as mechanical and electrical interfaces for transfer printed micro- and nano-pillar devices

Abstract

In this paper we report a novel application of electrically conductive film (ECF) of Ag sub-micron particles that includes both isotropic and anisotropic film technologies in providing simultaneous electrical contact and mechanical anchor between fracture transfer-printed (1-D) single crystal semiconductor micro-and nano-pillars and a carrier substrate. We assembled silver sub-micron particles (AgSP) monolayers with varying particle diameters and investigated their optical and electrical characteristics prior to their incorporation into thermoplastic polymers. It was found that transfer-printing of the Si micropillar arrays, into electrically conductive thermoplastic receiver substrates, made of films of AgSP/PMMA blends atop metallic substrates could be effectively achieved to yield electrically interfaced 1-D Si micropillar arrays with retention of their orientation and integrity according to the SEM images. The carrier substrate can potentially be reused to generate additional Si micropillar arrays that can be similarly harvested.

Incident light angle dependence of microwalled silicon solar cell efficiency for fracture transfer printing applications

“…Details of the Bosch recipe is described in elsewhere . To transfer the prepared Si MP and NW arrays from Si wafer (mother substrate) to a glass substrate (carrier substrate), fracture‐transfer mechanism was employed by utilization of a polymer layer (PMMA) as a transferring material, details of which has been given elsewhere .…”

Periodic Parallel Array of Nanopillars and Nanoholes Resulting from Colloidal Stripes Patterned by Geometrically Confined Evaporative Self-Assembly for Unique Anisotropic Wetting

“…Specifically, a regular stripe-shaped pattern of nanoparticles (NPs) can find potential applications in surface engineering, − optoelectronics, − biotechnology, etc. Numerous methods have been exploited to pattern NPs into such functional structures, including e-jet printing, micro contact printing, nanopipetting, template-directed assembly, , nanolithography, optical trapping assembly, and electrically and magnetically induced assembly, , which are mostly based on self-assembly of various NPs from a colloidal dispersion. Evaporative or convective self-assembly approaches − have attracted great attention from researchers as high-throughput and nonlithographic techniques for patterning spatially ordered stripes or hierarchical structures.…”