Electrodeposition of gold nanoparticles on ITO: Control of morphology and plasmon resonance-based absorption and scattering

Sakai, Nobuyuki; Fujiwara, Yusuke; Arai, M.; Yu, Kefeng; Tatsuma, Tetsu

doi:10.1016/j.jelechem.2008.12.008

Cited by 75 publications

(49 citation statements)

References 35 publications

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“…[13][14][15] Although various self-assembly approaches have been applied to the deposition of gold nanostructures on TCOs, they usually require special organic binders such as (aminopropyl)siloxane, (mercaptopropyl)siloxane, 16 which often deteriorate the catalytic activity and conductivity of Au deposits. Meanwhile there were many reports on the electrodeposition of Au directly on ITO in an aqueous phase, [17][18][19] it was hardly found on FTO even though the latter is more useful in many cases where higher thermal and chemical stabilities are required. Sheridan et al directly electrodeposited Au nanoparticles on FTO and 3-aminopropyldimethylmethoxysilane (ADMMS)-modified FTO in an aqueous phase with an emphasis on the control of nucleation mechanism, 20 while the potential application to sensing devices were left for further study.…”

Section: -7mentioning

confidence: 99%

Electrodeposition of Gold on Fluorine-Doped Tin Oxide: Characterization and Application for Catalytic Oxidation of Nitrite

Rahman¹,

Li²,

Lopa³

et al. 2014

Bulletin of the Korean Chemical Society

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Section: -7mentioning

confidence: 99%

Electrodeposition of Gold on Fluorine-Doped Tin Oxide: Characterization and Application for Catalytic Oxidation of Nitrite

Rahman¹,

Li²,

Lopa³

et al. 2014

Bulletin of the Korean Chemical Society

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“…For the 4 nm Au nanoparticle the absorption peak revolves around λ max = 510.28 nm corresponds to the conduction band energy of 2.432 eV. A red-shift of the absorption peak based on LSPR in metal nanoparticles has been well documented (Pan et al, 1993;Sakai et al, 2009). We found that the absorption peaks λ max appear at 404.79, 408.36, 412.55, 415.73, 418.42 and 420.96 nm for Ag nanoparticles of diameters 4, 5, 7, 10, 15 and 25 nm respectively.…”

Section: Resultsmentioning

confidence: 93%

Quantum Mechanical Calculation of the Optical Absorption of Silver and Gold Nanoparticles by Density Functional Theory

Gharibshahi¹,

Saion²

2010

Physics International

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Problem statement: Metal nanoparticles confine the motion of conduction electrons and exhibit a strong optical absorption of electromagnetic radiation in the UV-vis-NIR region. The absorption is classically derived from the collective oscillations of free electrons in a metallic nanostructure as a consequence of incident electromagnetic radiation polarizing the particle optically embedded in a dielectric matrix. These oscillations, known as the localized surface Plasmon resonance has been modelled by Gustav Mie in 1908 using the Maxwell's equations. Nevertheless, the electrodynamics approach cannot account for the electronic transitions often displayed in experiment as a broad UV-vis optical absorption spectrum originated from the conduction electrons of metal nanoparticles. A quantum mechanical approach is required to address the optical absorption spectra of metal nanoparticles systemically. Approach: In this study, an attempt was made to calculate the optical absorption spectra of conduction electrons of metal nanoparticle quantum mechanically using the density functional theory. The particle was an isolated spherical metal nanoparticle containing N atoms confined in a face-centered cubic lattice structure. When light strikes the particle, the occupied ground-state conduction electrons absorbed the energy and excite to the unoccupied higher energy-state of the conduction band. In this development, we used time-independent Schrodinger equation for the ground-state energy of ThomasFermi-Dirac-Weizsacker atomic model for the total energy functional and the density function in the Euler-Lagrange equation is algebraically substituted with the absorption function. The total energy functional was computed numerically for silver and gold nanoparticles at various diameters. Results: The results showed broad absorption spectra derived from the occupied ground-state conduction electrons at the orbital {n = 5 and l = 0 or 5s} for silver and {n = 6 and l = 0 or 6s} for gold, which excite to the unoccupied higher energy of conduction band at the orbital {n≥6 and l = 0 or 1} for silver and {n≥7 and l = 0 or 1} for gold. A nonlinear red-shift of the absorption peak λ max , appearing at 404.79, 408.36, 412.55, 415.73, 418.42 and 420.96 nm for silver and at 510.28, 520.91, 533.11, 542.35, 549.74 and 556.04 nm for gold when the particle diameter varies at 4, 5, 7, 10, 15 and 25 nm respectively. The quantum confinement effect of the conduction bands is stronger for silver and gold nanoparticles of less than about 20 nm in diameter. Conclusion: The optical absorption spectra of silver and gold nanoparticles have been successfully calculated using a quantum treatment and this calculation could be extended to other transition metal nanoparticles of interest in nanoscience and nanotechnology.

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“…[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%

“…[7,9,21] In previous trials, cyclic voltammetry, potential-sweeping, and potential-step modes have been used. [6,7,9,22] The formation of gold ion complex with cysteine (2-amino-3-mercaptopropionic acid) has, for example, resulted in enhancement of the number of the electrodeposited AuNPs with bumpy, thorny or dendritic shapes. [9,23] Pulsating current can, however, result in smoother, brighter, finer, and less porous Au grains with respect to the direct current.…”

Section: Parisa Vahdatkhah and Sayed Khatiboleslam Sadrnezhaadmentioning

confidence: 99%

“…[6,7,9,22] The formation of gold ion complex with cysteine (2-amino-3-mercaptopropionic acid) has, for example, resulted in enhancement of the number of the electrodeposited AuNPs with bumpy, thorny or dendritic shapes. [9,23] Pulsating current can, however, result in smoother, brighter, finer, and less porous Au grains with respect to the direct current. [24] This paper is to shed some light on the effect of PED parameters (current density and frequency), cysteine (HO 2 CCH(NH 2 )CH 2 SH) and potassium iodide (KI) additives and copper and indium tin oxide (ITO) substrate coats on current efficiency, and surface morphology of the gold nanoparticles electrodeposited by pulse current.…”

Section: Parisa Vahdatkhah and Sayed Khatiboleslam Sadrnezhaadmentioning

confidence: 99%

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Influence of Substrate, Additives, and Pulse Parameters on Electrodeposition of Gold Nanoparticles from Potassium Dicyanoaurate

Vahdatkhah

Sadrnezhaad

2015

Metall Mater Trans B

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Gold nanoparticles (AuNPs) of less than 50 nm diameter were electrodeposited from cyanide solution by pulsating electric current on modified copper and indium tin oxide (ITO) films coated on glass. Morphology, size, and composition of the deposited AuNPs were studied by X-ray photoelectron spectroscopy, atomic force microscopy, and field emission scanning electron microscopy. Effects of peak current density, pulse frequency, potassium iodide and cysteine on grain size, and morphology of the AuNPs were determined. Experiments showed that cathode current efficiency increases with the pulse frequency and the iodide ion. Size of the AuNPs increased with the current density. The number of nucleation sites was larger on ITO than on Cu layer; while the average diameter of the crystallites on ITO was smaller than on Cu layer.

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Electrodeposition of gold nanoparticles on ITO: Control of morphology and plasmon resonance-based absorption and scattering

Cited by 75 publications

References 35 publications

Electrodeposition of Gold on Fluorine-Doped Tin Oxide: Characterization and Application for Catalytic Oxidation of Nitrite

Electrodeposition of Gold on Fluorine-Doped Tin Oxide: Characterization and Application for Catalytic Oxidation of Nitrite

Quantum Mechanical Calculation of the Optical Absorption of Silver and Gold Nanoparticles by Density Functional Theory

Influence of Substrate, Additives, and Pulse Parameters on Electrodeposition of Gold Nanoparticles from Potassium Dicyanoaurate

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