Accession Number:

ADA222405

Title:

Face-Specific Interaction of MOS4(2-) with Oriented Crystals of (0001) CdX(X = Se, S)

Descriptive Note:

Interim rept. May 1989-May 1990,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1990-05-17

Pagination or Media Count:

17.0

Abstract:

Oriented 0001 Cdx X S, Se crystals selectively adsorb MoS42- Molybdenum tetrasulfide ion onto the Cadmium-rich faces. Binding of MoS42- is effected by dipping the CdX crystals into CH3CN acetonitrile containing 20 mM Et4N2MoS4. Removal of the crystal from the solution followed by rinsing with CH3CN leaves MoS42- on the Cd- but not X-rich face of the crystal as detected by X-ray photoelectron spectroscopy XPS and Auger electron spectroscopy AES. The specificity for Cd-face vs. X-face binding is typically 51 as determined by XPS and AES data for both faces of the same crystal. S element maps for the MoS42--modified, Cd-face of CdSe crystals reveal non- uniform binding of MoS42-. There is a correlation of the regions of MoS42- binding with the crystal planes revealed in the pretreatmentetch procedure. jg

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE