journal article·2021-05-28

Poly(2-hydroxyethyl methacrylate) Hydrogels Doped with Gold Nanoparticles for Surface-Enhanced Raman Spectroscopy

Praveen, Shuko Suzuki, Idriss Blakey, Peta L. Clode, Martin Saunders, Matthew B. Myers, Traian V. Chirila, Murray V. Baker

ACS Applied Nano Materials· Volume 4· Issue 5
Publisher page

Abstract

Poly(2-hydroxyethyl methacrylate) hydrogels doped with gold nanoparticles (Au-PHEMA) were prepared via photochemically and thermally induced phase separation polymerization of aqueous formulations containing 2-hydroxyethyl methacrylate (HEMA), a cross-linker, an initiator, and either KAuCl4 or (CH3)2SAuCl. In photopolymerizations, 2,2-dimethoxy-2-phenylacetophenone (DPAP) served as the photoinitiator of polymerization of HEMA but also appeared to play a role in the reduction of Au(III) to Au(0). For thermal polymerizations, potassium persulfate (K2S2O8) was used to initiate polymerization of HEMA, and it appeared that the resulting PHEMA was responsible for the reduction of Au(III) to Au(0). The Au-PHEMA hydrogels exhibited the morphology based on a network of polymer droplets and interconnected pores characteristic of PHEMA formed via polymerization-induced phase separation, with only minor differences in the sizes of the polymer droplets and mechanical properties. The application of Au-PHEMA as a platform for surface-enhanced Raman scattering was demonstrated using an 80 ppb solution of 4-ethynylbenzaldehyde as an analyte.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Gold and Silver Nanoparticles Synthesis and Applications · Nonlinear Optical Materials Studies · Spectroscopy Techniques in Biomedical and Chemical Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Molecular Sciences, The University of Western Australia (UWA), Perth, Western Australia 6009, Australia

Queensland Eye Institute, 140 Melbourne Street, South Brisbane, Queensland 4101, Australia

Centre for Advanced Imaging, The University of Queensland, St. Lucia, Queensland 4072, Australia

ARC Centre for Biomedical Imaging Technology, The University of Queensland, St. Lucia, Queensland 4072, Australia

Australian Institute for Bioengineering & Nanotechnology, The University of Queensland, St. Lucia, Queensland 4072, Australia

Centre for Microscopy, Characterisation & Analysis, The University of Western Australia (UWA), Perth, Western Australia 6009, Australia

School of Biological Sciences, The University of Western Australia (UWA), Perth, Western Australia 6009, Australia

Commonwealth Scientific and Industrial Research Organisation, 26 Dick Perry Avenue, Kensington, Western Australia 6155, Australia

Faculty of Science and Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia

Faculty of Medicine, The University of Queensland, Herston, Queensland 4029, Australia

Funding

Australian Research Council

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