Evaluation of Electrodeposited Gold Nanostructures for Applications in QCM Sensing

Terao, Kyohei; Kakita, Chihiro; Nagase, Noriko; Miyanishi, Nobumitsu; Suzuki, Takao; Takao, Hidekuni; Shimokawa, Fusao; Oohira, Fumikazu

doi:10.2116/analsci.28.291

Cited by 2 publications

(2 citation statements)

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“…Similar structures were registered when AuNS were electrodeposited on an ITO electrode by applying −0.3 V for 3600 s [30]. It is well known that the morphology and shape of AuNS depend on the applied potential, deposition time, and the composition of the synthesis solution [24]. In our case, the reason for such a difference in AuNS morphology possibly lies in the choice of supporting electrolyte and the pH value of the initial solution.…”

Section: Resultssupporting

confidence: 78%

“…Gold nanostructures (AuNS) can be electrodeposited on the surface of various electrodes [23], wherein the morphology of deposited AuNS could be easily controlled to some extent by choosing deposition conditions, such as synthesis time, electrode potential, and the composition of the synthesis solution [24]. It is well known that optical and electrochemical properties depend on the size and morphology of AuNS [25].…”

Section: Introductionmentioning

confidence: 99%

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Electrodeposited Gold Nanostructures for the Enhancement of Electrochromic Properties of PANI–PEDOT Film Deposited on Transparent Electrode

et al. 2020

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Conjugated polymers (CPs) are attractive materials for use in different areas; nevertheless, the enhancement of electrochromic stability and switching time is still necessary to expand the commercialization of electrochromic devices. To our best knowledge, this is the first study demonstrating the employment of electrodeposited gold nanostructures (AuNS) for the enhancement of CPs’ electrochromic properties when a transparent electrode is used as a substrate. Polyaniline–poly(3,4-ethylenedioxythiophene) (PANI-PEDOT) films were electrodeposited on a transparent indium tin oxide glass electrode, which was pre-modified by two different methods. AuNS were electrodeposited at −0.2 V constant potential for 60 s using both the 1st method (synthesis solution consisted of 3 mM HAuCl4 and 0.1 M H2SO4) and 2nd method (15 mM HAuCl4 and 1 M KNO3) resulting in an improvement of optical contrast by 3% and 22%, respectively. Additionally, when using the 1st method, the coloration efficiency was improved by 50% while the switching time was reduced by 17%. Furthermore, in both cases, the employment of AuNS resulted in an enhancement of the electrochromic stability of the CPs layer. A further selection of AuNS pre-modification conditions with the aim to control their morphology and size can be a possible stepping stone for the further improvement of CPs electrochromic properties.

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Section: Resultssupporting

confidence: 78%