Block-Copolymer Templated Gold Nanostructures for Molecular Sensing through SERS Spectroscopy

• Main Authors: Belda Amelia Junisu, 蓓達
• Other Authors: Ya-Sen Sun
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/b5x4a5

碩士 === 國立中央大學 === 化學工程與材料工程學系 === 107 === Self-assembled nanostructures from amphiphilic block copolymers have received interests in nanoscience and nanotechnology. Incorporating metals within self-assembled block-copolymer nanodomains as a template could form versatile and robust nanostructures with a broad range of applications, including surface-enhanced Raman scattering (SERS) enhancement. SERS is an important tool for the analytical, trace detection of many inorganic and organic materials. Self-assembly can avoid aggregation of gold nanostructures which could decrease its performance in some way. Hence, in this study, self-assembly of BCP was used to form nanoporous networks through surface reconstruction of micellar films of multilayer thickness (SR-PS-b-P2VP). UV irradiation in nitrogen (UVIN) was used to stabilize the template and to reduce the gold ions to form gold seeds (GS-PS-b-P2VP). Gold nanostructure (GN-PS-b-P2VP) were further formed through the growth approach. As a result, a straightforward seed-growth method allows the formation of gold interconnected frameworks through templating of the soft template. The corresponding enhancement factor of gold substrates using R6G as the model molecule are ~108 and ~106 folds for 10 µM and 1 µM R6G, respectively. Such results prove the excellent performance of gold nanostructure fabricated from a relatively simple and cost-effective method for high potential in SERS-related applications.