Radiolytic production and properties of ultrasmall CdS particles

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100348a040· OSTI ID:7025938

Hayes, D; Swayambunathan, V ^[1]; Micic, O I; Nenadovic, M T; Meisel, D ^[2]

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1. Argonne National Lab., IL (USA)
2. Boris Kidric Institute of Nuclear Chemistry, Belgrade (Yugoslavia)

The radiolytic production of CdS particles from solutions containing cadmium ions and a thiol (3-mercapto-1,2-propanediol, RSH) is described. The production of the colloids is initiated by the reaction of solvated electron with the thiol to release HS{sup {minus}} ions. The polynuclear complexes of cadmium with the thiolate form of RSH act as moderators to the growth of the particles and allow reproducible production of practically any predetermined size particles. The complexes at the surface of the particles also stabilize the particles for long periods of time. The particles are strongly fluorescent from size of ca. 8 {angstrom} in radius. Excess electrons in these particles lead to bleaching of the exciton band due to Coulomb screening effects. At higher doses, formation of cadmium atoms leads to increased absorption in the visible range.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7025938
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 93:11; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360100* -- Metals & Alloys
360101 -- Metals & Alloys-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CADMIUM COMPOUNDS
CADMIUM IONS
CADMIUM SULFATES
CHARGED PARTICLES
CHEMICAL PROPERTIES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DATA
DECOMPOSITION
DISPERSIONS
EXPERIMENTAL DATA
INFORMATION
IONS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
OXYGEN COMPOUNDS
PRODUCTION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SULFATES
SULFUR COMPOUNDS