Electrochemical Self-Assembly of Copper/Cuprous Oxide Layered Nanostructures

Switzer, Jay A.; Hung, Chen-Jen; Huang, Ling‐Yuang; Switzer, Eric R.; Kammler, Daniel R.; Golden, Teresa D.; Bohannan, Eric W.

doi:10.1021/ja974366w

Cited by 129 publications

(105 citation statements)

References 21 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…Commercially available have previously used electrodeposition to create 9-MHz AT-cut quartz crystals (Seiko EG and G superlattices of metal oxides [14][15][16] and nonequilmodel QA-AM9-AU) were used as the working ibrium layered nanostructures of Cu,0 and Cu which electrode during electrochemical quartz crystal mishowed quantum confinement effects in electrical crobalance (EQCM) experiments. The quartz crystals properties [17][18][19][20][21]. Recently, we reported that epihave a coating on both sides consisting of a 500 A Ti taxial films of 8-Bi 2 03 can be electrodeposited on layer beneath a 3000 A layer of Au.…”

mentioning

confidence: 99%

Low-temperature electrodeposition of the high-temperature cubic polymorph of bismuth(III) oxide

et al. 2000

View full text Add to dashboard Cite

mentioning

confidence: 99%

Low-temperature electrodeposition of the high-temperature cubic polymorph of bismuth(III) oxide

et al. 2000

View full text Add to dashboard Cite

“…[18][19][20] It is thus well known that Cu 2 O is electrodeposited during the positive-going spikes in potential, while Cu and Cu 2 O composite is electrodeposited during the negative-going excursions. adjusted to 9.0 using a 5 M NaOH solution.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Pt-CuO Nanocomposite Films for Non-Enzymatic Glucose Sensor Application

Myung

Kim

Lee

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

Nanocomposite films of Pt-CuO were synthesized via galvanostatic electrodeposition combined with galvanic replacement and post-synthesis thermal anneal. First, Cu-Cu 2 O composite was prepared by galvanostatic electrodeposition; heat-treatment of the as-prepared Cu-Cu 2 O composite at 375 • C for 10 h resulted in a CuO electrode showing response to glucose with long term stability. Further enhanced response to glucose was obtained with a Pt-CuO electrode, which was synthesized by galvanic replacement of Cu-Cu 2 O in 10 mM PtCl 4 solution for 30 s followed by annealing at 375 • C for 10 h. The resulting Pt-CuO electrode showed excellent response to glucose in alkaline solution with an analytical sensitivity of 3812 μAmM −1 cm −2 , a limit of detection (LOD) of 7.5 μM, and a linear response range to glucose up to 0.6 mM. These results may be extended to the fabrication of other noble metal-metal oxide nanocomposite electrodes for sensor applications. Millions of people worldwide are afflicted with diabetes, a disease necessitating regular monitoring of blood glucose levels. Amperometric sensing 1-13 is a particularly popular approach to glucose sensing but classical methodology is based on enzymatic monitoring using glucose oxidase which oxidizes the catalytic conversion of glucose to glucolactone. However, a perennial problem with the enzymatic approach is the lack of long term stability and robustness of the sensing device. In terms of selectivity and sensitivity, enzymatic sensors do generally exhibit better performance than non-enzymatic ones. 1,2,5,6 However, as noted earlier, they suffer from several problems including poor stability, high cost, fragility of the enzyme component, and difficulty of active sensing component preparation. 1,2,[5][6][7] Non-enzymatic approaches, therefore, have gained traction in recent years. Thus non-enzymatic amperometric sensors [8][9][10][11][12][13] have been electrosynthesized using MnO 2 , CuO, or cobalt oxide/hydroxide as the active sensor materials. Several reviews are available in the area of non-enzymatic glucose sensors. [8][9][10][11][12][13] Among the non-enzymatic glucose sensing components based on metals and metal oxides, CuO is one of the more promising materials due to its low cost, high stability and earth abundance.2,14 Copper(II) oxide (CuO) which is a p-type semiconductor with a bandgap 1.2 eV has been widely used in many applications including catalyst, gas sensor, battery, and biosensor. [3][4][5][6][7] This inorganic semiconductor has also shown good electrochemical activity and capability of promoting facile electron transfer rates at low overpotentials in alkaline electrolytes. 15Noble metals such as Pt, Au and Ag have been extensively used to improve sensing performance due to their excellent electrocatalytic activity and biocompatibility.2 Especially, Pt-based metal oxides have been proposed for improving the sensitivity and selectivity of non-enzymatic glucose sensors.1,2,4 Unlike CuO-based glucose sensors, however, there is more limited precedent ...

show abstract

“…[1][2][3][4][5][6][7][8][9] Em termos da morfologia dos depósitos formados, um aspecto interessante é a estruturação interfacial auto-organizada adjacente ao processo oscilatório. Além de questões fundamentais associadas a esses processos ainda não decifradas, tal estratégia de manipulação da arquitetura interfacial por meio de processos auto-organizadores se apresenta como muito promissora para a obtenção de materiais eletródicos com propriedades específicas.…”

Section: Introductionunclassified

Co-eletrodeposição oscilatória de cobre e estanho

Joanni¹,

González²,

Varela³

2008

Quím. Nova

View full text Add to dashboard Cite

Recebido em 17/9/07; aceito em 18/1/08; publicado na web em 20/8/08OSCILLATORY CO-ELECTRODEPOSITION OF COPPER AND TIN. It is investigated in the present contribution the oscillatory co-electrodeposition of CuSn on a polycrystalline gold surface in the presence of Triton X-100 surfactant and citric acid as additive, in acidic media. The experiments were conducted under potentiostatic control and the system dynamics characterized in terms of the morphology and stability of the current oscillations. Besides modulations in the frequency and amplitude of the current oscillations, several patterned states were observed, including relaxation-like and mixed mode oscillations. The oscillations were found to be very robust and some time series presented regular motions up to about two hours.Keywords: oscillations; electrodeposition; self-organization. INTRODUÇÃOA eletrodeposição de metais, ligas e óxidos metálicos em regime oscilatório tem sido objeto de vasta investigação nos últimos anos. [1][2][3][4][5][6][7][8][9] Em termos da morfologia dos depósitos formados, um aspecto interessante é a estruturação interfacial auto-organizada adjacente ao processo oscilatório. Além de questões fundamentais associadas a esses processos ainda não decifradas, tal estratégia de manipulação da arquitetura interfacial por meio de processos auto-organizadores se apresenta como muito promissora para a obtenção de materiais eletródicos com propriedades específicas. Vários eletrodepósitos obtidos através dessa metodologia têm propriedades específicas e, portanto, possuem lugar de destaque em algumas aplicações. Como exemplo, pode-se citar as propriedades magnéticas de multicamadas de níquel e cobre (mais precisamente Ni/Cu e Cu). 10-12Oscilações de corrente durante a eletrodeposição de cobre e estanho na presença de surfactante foram observadas recentemente.2,5,9 O mecanismo geral associado ao aparecimento de oscilações durante a deposição de metais na presença de surfactantes é conhecido há algum tempo.13,14 Em linhas gerais, a adsorção de surfactantes catiônicos compete por sítios superficiais com os cátions em solução na mesma faixa de potencial, gerando, por conseguinte, uma curva corrente (I) versus potencial ( ) em forma de "N", com sua correspondente resistência diferencial negativa (NDR, negative differential resistance). Mecanisticamente, tais sistemas são classificados como osciladores eletroquímicos do tipo N-NDR. Adicionalmente, o transporte de massa de espécies eletroativas à superfície do eletrodo pode contribuir como um ciclo de retro-alimentação negativa. Nesses termos, Nakato e colaboradores 5,9 discutiram os detalhes da dinâmica oscilatória do sistema Cu/Sn como dado a seguir. Considere-se inicialmente que o cobre é depositado em potenciais em torno de 300 mV menos negativo que o estanho. Devido à diferença de eletronegatividade, o estanho presente no co-depósito Sn-Cu encontra-se carregado positivamente e o cobre negativamente, de forma que a quantidade de surfactante catiônico adsorvido na superfície aumenta com o aumento...

show abstract

Electrochemical Self-Assembly of Copper/Cuprous Oxide Layered Nanostructures

Cited by 129 publications

References 21 publications

Low-temperature electrodeposition of the high-temperature cubic polymorph of bismuth(III) oxide

Low-temperature electrodeposition of the high-temperature cubic polymorph of bismuth(III) oxide

Facile Synthesis of Pt-CuO Nanocomposite Films for Non-Enzymatic Glucose Sensor Application

Co-eletrodeposição oscilatória de cobre e estanho

Contact Info

Product

Resources

About