2011
DOI: 10.1088/0957-4484/22/27/275711
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RF-sputtering preparation of gold-nanoparticle-modified ITO electrodes for electrocatalytic applications

Abstract: The preparation of gold-nanoparticle (AuNPs)-modified indium tin oxide (ITO) electrodes (AuNPs/ITO) was performed by radio-frequency (RF) sputtering from Ar plasmas at temperatures as low as 60 °C, tailoring the AuNP morphology and content as a function of the sole sputtering time. The latter parameter was varied from 5 to 20 min in order to investigate the influence of gold amount and distribution on the electrochemical performances of the resulting AuNPs/ITO systems. The electrodes were characterized using f… Show more

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Cited by 22 publications
(20 citation statements)
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“…[1,2] Conductive substrates coated with AuNPs are usable in electronic and biochemical sensors and electrodes owing to their excellent electrocatalytic behavior. [2][3][4][5][6][7] An example is AuNP-ITO which is used for making electrodes. [8] This material has good electrical conductivity, high stability, and capability to promote heterogeneous electron transfer.…”
Section: Parisa Vahdatkhah and Sayed Khatiboleslam Sadrnezhaadmentioning
confidence: 99%
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“…[1,2] Conductive substrates coated with AuNPs are usable in electronic and biochemical sensors and electrodes owing to their excellent electrocatalytic behavior. [2][3][4][5][6][7] An example is AuNP-ITO which is used for making electrodes. [8] This material has good electrical conductivity, high stability, and capability to promote heterogeneous electron transfer.…”
Section: Parisa Vahdatkhah and Sayed Khatiboleslam Sadrnezhaadmentioning
confidence: 99%
“…[8] This material has good electrical conductivity, high stability, and capability to promote heterogeneous electron transfer. [2,3,9] Applications of AuNP-ITO include the electro-oxidation of uric acid, ascorbic acid, dopamine, norepinephrine, epinephrine, [10] and nitric oxide. [11] AuNP-ITO provides a biocompatible matrix for immobilization of hemoglobin (Hb), [12] effective H 2 O 2 reduction catalysis with stable reproducibility, [12] myoglobin (Mb) immobilization, and mediator-free H 2 O 2 sensor development [13] with promotion of the electrocatalytic activity of three-dimensional monolayer of 3-mercaptopropionic acid (MPA) assembled on AuNP-ITOs, [14] electrochemical response of the hydroquinone and p-aminophenol in phosphate buffer solutions [15] and electrochemical measurement of biomolecules such as simultaneous electrochemical determination of guanosine/guanosine-5¢-triphosphate, adenosine/adenosine-5¢-triphosphate, and dopamine/serotonin.…”
Section: Parisa Vahdatkhah and Sayed Khatiboleslam Sadrnezhaadmentioning
confidence: 99%
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“…Metal nanoparticles in conjugation with redox proteins have been proved good candidates for enzymatic molecule based biosensors as AuNPs has large surface area for enzyme immobilization, its biocompatible nature and suitable for direct electron transfer from catalytic molecule to electrode. 20 Hence the modified hybrid electrodes usually exhibit a unique electrocatalytic behavior or high sensitivity. The electrochemical detection of H 2 O 2 by using protein containing the heme groups, such as myoglobin [21][22] and hemoglobin [23][24] which possess peroxidase like catalytic activity, which can reduce H 2 O 2 due to electroactive heme center, has been reported by different research groups.…”
Section: Introductionmentioning
confidence: 99%