Browsing by Author "Chang, Fang-Ching"

Now showing 1 - 2 of 2

Au-Pt-Pd spherically self-assembled nano-sieves as SERS sensors
(2020-11-30)
Chang, Fang-Ching
;
Huang, Jing-Wen
;
Chen, Chun-Hua
;
材料科學與工程學系
;
Department of Materials Science and Engineering
A series of unique granular and petaloid Au-capped Pt-Pd spherically-assembled nano-sieves (Au-PP SANSs) - with diameters smaller than 100 nm, combining quasi-regularly integrated surface-enhanced Raman scattering (SERS) active nanocrystals and a functional amphiphilic organic frame - have been successfully synthesized through a facile chemical route with a temperature-sensitive triblock copolymer soft template. Further, it has been demonstrated that they are potential candidates for developing highly-selective molecule-sieve assisted SERS sensors. The combination of the superposed inorganic and organic dual-core shell structures in Au-PP SANSs acts as a molecular sieve, which plays a crucial role in the promising chemical selectivity, which helps distinguish polar malachite green oxalate salt and non-polar thiabendazole molecules. (C) 2020 Elsevier B.V. All rights reserved.
Pt-Pd Floating Nanoarrays Templated on Pluronic F127 Micelles as Effective Surface-Enhanced Raman Scattering Sensors
(2019-04-01)
Chang, Fang-Ching
;
Li, Yen-Cheng
;
Wu, Ren-Jye
;
Chen, Chun-Hua
;
材料科學與工程學系
An innovative concept of floating nanoarrays (FNAs) as promising new-generation surface-enhanced Raman scattering (SERS) sensors was proposed for the first time and has been successfully realized via a facile triblock-copolymer-assisted chemical route. At least two categories of the complicated highly uniform Pt-Pd FNAs with a fairly small assembled diameter of less than 100 nm respectively consisted of quasi-orderly assembled spherical and petal-like nanocrystals with unique radially distributed compositions were evidently classified and reproducibly fabricated. The synthesized Pt-Pd FNAs were found to exhibit unusually strong surface plasmon resonance bands in the visible region and have been successfully demonstrated as practical SERS sensors with remarkably low analytical limits of detection.