Chemical etching of lead chalcogenides

Robozerov, V. V.; Zykov, V. A.; Gavrikova, T. A.

doi:10.1007/bf02758011

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…The following dissolution reaction has been proposed for etching of PbS with potassium ferricyanide: PbS + 8 false[ Fe III false( CN false) 6 false] 3 − + 11 OH − ⇄ HPbO 2 − + 8 false[ Fe II false( CN false) 6 false] 4 − + SO 4 2 − + 5 normalH 2 normalO …”

Section: Resultsmentioning

confidence: 99%

“…Identification of PbS(111) film surface termination was obtained by anisotropic etch in solution containing 0.5 M KOH and 0.2 M K 3 [Fe(CN) 6 ], for various periods of time. 31 2.4. Characterization Methods.…”

Section: Methodsmentioning

confidence: 99%

“…The Journal of Physical Chemistry C ARTICLE However, this is only an estimation due to differences in etch pit dimensions and geometries, subgrain boundaries, etc. The following dissolution reaction has been proposed for etching of PbS with potassium ferricyanide: 31 PbS…”

Section: Physico-chemical Characterization Of Pbs Filmmentioning

confidence: 99%

“…However, given that Fm3m is a centrosymmetric crystal structure, polarity determination using CBED is unfeasible in this case due to lack of differences in intensity obtained along the AE111ae and <1 1 1> directions. A large variety of chemicals can be used for etching of lead chalcogenides, 31 although recipes for anisotropic etch of PbS have not been reported to date. Furthermore, the sensitivity of the Kelvin probe technique to changes in surface electronic properties, which is done by measuring the contact potential differences (CPD), 32 may provide information on the effect of surface termination on the resulting electronic properties.…”

Section: Introductionmentioning

confidence: 99%

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Surface Termination Control in Chemically Deposited PbS Films: Nucleation and Growth on GaAs(111)A and GaAs(111)B

Osherov¹,

Matmor²,

Froumin³

et al. 2011

J. Phys. Chem. C

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This study addresses the question of whether chemically deposited PbS thin films grown on GaAs(111) are affected by the oppositely terminated substrate surfaces, gallium terminated GaAs(111)A and arsenic terminated GaAs(111)B. The differences in PbS film deposition pathway in both cases of substrate surface termination were investigated using X-ray photoelectron spectroscopy (XPS), Raman scattering, and contact potential difference (CPD) measurements. The morphology, microstructure, and crystallographic orientation of the films were studied using scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. XPS and CPD measurements indicated that PbS films deposited on oppositely terminated GaAs(111) surfaces possessed corresponding surface terminations, with PbS(111)B obtained on GaAs-(111)B and PbS(111)A on GaAs(111)A. Subsequently, different surface oxides were detected by XPS on A and B terminated PbS(111), with lead oxide obtained on PbS(111)A and PbSO 3 obtained on PbS(111)B. Moreover, CPD measurements revealed that PbS(111)A shows a 40 mV smaller work function than PbS(111)B surfaces, therefore emphasizing the importance of polarity and surface termination control for heterojunction based electronic devices.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Physico-chemical Characterization Of Pbs Filmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface Termination Control in Chemically Deposited PbS Films: Nucleation and Growth on GaAs(111)A and GaAs(111)B

Osherov¹,

Matmor²,

Froumin³

et al. 2011

J. Phys. Chem. C

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“…One of the most widely used is the Pourbaix diagram, also known as a potential -pH diagram, which is a graphic representation of equilibrium potential with respect to the standard hydrogen electrode (Y axis) versus pH (X axis) corresponding to the various equilibria between the different compounds of a given metal under standard thermodynamic conditions [1,2]. Pourbaix diagram for lead has proved to be very useful in many fields, such as corrosion [3][4][5][6][7][8], industrial electrolysis, plating, electrowinning and electrorefining of metals [9][10][11], primary and secondary electrochemical cells [3,[12][13][14][15], water treatment and hydrometallurgy [16][17][18][19][20][21], geo-and environmental chemistry [22], energy science and engineering, analytical chemistry [23] and chemical education [24].…”

Section: Introductionmentioning

confidence: 99%

The revised potential – pH diagram for Pb – H₂O system

Nikolaychuk

2018

Ovidius University Annals of Chemistry

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Thermodynamic properties of lead species in aqueous solution are collected. The chemical equilibria between various forms of Pb(II) are considered. The speciation diagrams for the equilibria 4[PbOH]+(aq) ⇄ [Pb4(OH)4]4+(aq) and 2[Pb3(OH)4]2+(aq) ⇄ [Pb6(OH)8]4+(aq), and the thermodynamic activity - pH diagram of Pb(II) species are plotted. Basic chemical and electrochemical equilibria for lead are calculated. The potential - pH diagram for Pb - H2O system is revised.

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