Uosaki studies

Koinuma M and Uosaki K 1996 Atomic structure of bare p-GaAs(IOO) and electrodeposited Cu on p-GaAs (100) surfaces in H2SO4 solutions An AFM study J. Eiectroanai. Chem. 409 45-50... 

Yagi I, Lantz JM, Nakabayashi S, Corn RM, Uosaki K (1996) In situ optical second harmonic generation studies of electrochemical deposition of tellurium on polycrystalline gold electrodes. J Electroanal Chem 401 95-10... 

Ye, S., Nihonyanagi, S. and Uosaki, K. (2001) Sum frequency generation (SFG) study of the pH-dependent water structure on a fused quartz surface modified by an octadecyltrichlorosilane (OTS) monolayer. Phys. Chem. Chem. Phys., 3, 3463-3469. 

Uosaki, K., Yano, T. and Nihonyanagi, S. (2004) Interfacial water structure at as-prepared and UV-rnduced hydrophilic Ti02 surfaces studied hy sum frequency generation spectroscopy and quartz crystal microhalance. J. Phys. Chem. B, 108, 19086-19088. 

Noguchi, H., Okada, T. and Uosaki, K (2008) SPG study on potential-dependent structure of water at Pt electrode/ electrolyte solution interface. Electrochim. Acta, 53, 6841-6844. 

Saito and Uosaki [497] have studied the formation and morphological changes of the surface Li film on Au(lll) electrode in 0.1 M LiCl04 solution in PC applying STM. The surface film was observed at potentials more negative than 1.5 V (Li+/Li). Many nuclei appeared on the flat terrace of the electrode at potentials more negative than 0.9 V, where UPD of lithium on Au was started. 

Bokris and Uosaki (1) have studied transient photo-assisted electrolysis current for systems including a p-type semiconductor photocathode and dark Pt anode. A set of current vs. time scans taken with a ZnTe photocathode system is shown in Figure 6. 

Fig. 10.13. Tafel plots of the photocurrents of />GaP in various solutions. Curve 1,1 M NaOH curve 2, 0.5 M H2S04 curve 3, 1 M NaOH +1.7 m M methyl viologen (Reprinted from K. Uosaki, and H. Kita Mechanistic Study of Photoelectrochemical Reactions at a p-Gap Electrode, J. Electrochem. Soc. 128 2156,1981, Fig. 4. Reproduced by permission of the Electrochemical Society, Inc.)...

M. Koinume and K. Uosaki, Electrochim. Acta 40 1345 (1995). Atomic force microscope studies of GaAs. 

The importance of the surface state configuration for the operation of semiconductors is stressed by these studies (Uosaki and Koinuma, 1992). 

Principally two other classes of materials have been studied by in-situ STM and AFM the III-V compounds and layered materials. In-situ atomic resolution has been obtained on p-InSe by Uosaki and Kuomina [22]. Semiconductor oxides have not been studied since the early work of Itaya and Tomita on Ti02 [42] and ZnO [43]. STS [63, 64] and atomic resolution [64] have however been recently reported in air on Ti02. Kepler and Gewirth [21] could resolve in-situ individual atoms on Ge(lll) and (110) electrodes. That in-situ atomic resolution was obtained by AFM on Ge [21] and InSe [22] opens new possibilities for electrochemical studies since the sample bias is less subject to constraints of polarization. Photoeffects, induced by the laser beam need nevertheless being avoided. 

Ikeda K, Uosaki K (2009) Coherent phonon dynamics in single-walled carbon nanotubes studied by time-frequency two-dimensional coherent anti-stokes Raman scattering spectroscopy. Nano Lett 9 1378... 

The early studies on the one of the most popular process, copper UPD was presented by Uosaki and Kita They were... 

In the early stages of study of photoelectrochemical kinetics, two extreme models were presented. One is the model of Bockris and Uosaki,93 108,109 in which the charge transfer step was considered to be the rate-determining step and the other is Butler s model,110 in which the semiconductor/electrolyte interface was considered as a Schottky barrier, i.e., the electrochemical kinetics were neglected and all the potential drop occurred only within the semiconductor. 

Forrer P, Repphun G, Schmidt E, Siegenthaler H (1997) Electroactive polymers an electrochemical and in situ scanning probe microscopy study. In Jerkiewicz G, Soriaga MP, Uosaki K, Wieckowski A (eds) Solid-liquid electrochemical interfaces (ACS Symp Ser 656). American Chemical Society, Washington, DC, p210 Malhotra BD, Chaubey A, Singh SP (2006) Anal Chem Acta 578 59 Biallozor S, Kupniewska A (2005) Synth Met 155 443... 

Here, we will present an SFG study on (1) [147] as an example. Ye and Uosaki demonstrated that the water molecules at the quartz/OTS surface flip its orientation while the water molecules at the OTS surface maintain their orientation when the solution pH is changed from neutral to acidic. The results show that most of the silanol groups still exist on the fused quartz surface even after a silane... 

Kondo, T., Takakusagi, S. and Uosaki, K. (2009) Stability of underpotentially deposited Ag layers on a Au lll surface studied by surface X-ray scattering. Electrochemistry Communications, 11, 804-807. 

Uosaki K, Shigcanatsu Y, Kaneko S, Kita H (1989) Photoluminescence and impedance study of p-GaAs/ electrolyte interfaces under cathodic bias Evidence for flat-band potential shift during illumination and introduction of high-density surface states by Pt treatments. J Phys Chem 93 6521... 

Kondo T, Morita J, Okamura M, Saito T, Uosaki K (2002) In situ stmctural study on underpotential deposition of Ag on Au(lll) electrode using surface X-ray scattering technique. J Electroanal Chem 532 201-205. doi 10.1016/S0022-0728(02)00705-2... 

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