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Open AccessArticle

Gold Nanoisland Agglomeration upon the Substrate Assisted Chemical Etching Based on Thermal Annealing Process

1
Department of Industrial Engineering, School of Engineering, University of Phayao, Phayao 56000, Thailand
2
Department of Industrial Physics and Medical Instrumentation, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(6), 533; https://doi.org/10.3390/cryst10060533
Received: 28 May 2020 / Revised: 16 June 2020 / Accepted: 20 June 2020 / Published: 23 June 2020
(This article belongs to the Special Issue Optical and Microstructural Characterization of Thin Layers)
In this study, we proposed the self-organization process and its localized surface plasmon resonance property (LSPR) to study the effect of chemically treated quartz glass substrates for gold nanoisland array formation. Firstly, we etched a quartz glass substrate using a sputter etching machine. Secondly, n-butanol was treated on the surface of the substrate. Then, we deposited a gold thin film on the substrate with assisted chemical etching. Finally, the self-organization method examined the thermal annealing of gold nanoisland arrays on a substrate. The results showed that the gold nanoisland that was aggregated on an etched quartz glass substrate was large and sparse, while the gold nanoisland aggregated on a chemically treated substrate was small and dense. Further, it was revealed that a substrate’s surface energy reduced chemical treating and increased the gold nanoisland contact angle on the substrate via the thermal annealing process. It was also confirmed that chemical treatment was useful to control the morphology of gold nanoisland arrays on a substrate, particularly when related to tuning their optical property. View Full-Text
Keywords: annealed gold nanoislands; thermal annealing; assisted chemical etching; absorbance spectrum; LSPR annealed gold nanoislands; thermal annealing; assisted chemical etching; absorbance spectrum; LSPR
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MDPI and ACS Style

Potejanasak, P.; Duangchan, S. Gold Nanoisland Agglomeration upon the Substrate Assisted Chemical Etching Based on Thermal Annealing Process. Crystals 2020, 10, 533.

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