Abstract
Large specific surface area nanostructures are desirable in a wide range of sensing applications due to their longer light-trapping path and increased absorption. Engineering of the specific nanotree structure which possesses a high branch density turned out to be challenging from the experimental point of view, and certainly not adequately explored. This paper shows how to design substrates with a silicon nanotree structure for surface-enhanced Raman spectroscopy (SERS) applications. Silicon nanotrees were synthesized by a Ag-Au nanocluster-catalyzed low-pressure chemical vapor deposition method (LPCVD). By the presented approaches, it is possible to manipulate branches’ number, length and thickness. The synthesized nanostructures are flexible after immersion in water which improves SERS performance. The amount of sputtered metal played a key role in preserving the flexibility of the nanotree structure. The obtained substrates with highly fractal nanostructure were tested on 4-mercaptophenylboronic acid (MPBA) to match the optimal SERS parameters. The silicon nanotrees fabrication, and particularly obtained SERS substrates plated with Ag and Au nanoparticles, demonstrated good features and a promising approach for further sensor development.
Funder
Croatian Government and the European Union through the European Regional Development Fund—the Competitiveness and Cohesion Operational Programme
János Bolyai Research Scholarship of the Hungarian Academy of Sciences
New National Excellence Program of the Ministry of Human Capacities
Subject
Physical and Theoretical Chemistry,Analytical Chemistry
Cited by
1 articles.
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1. Peculiarities of using different nanostructures for surface-enhanced Raman scattering;2023 46th International Spring Seminar on Electronics Technology (ISSE);2023-05-10