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| A LUMINESCENT SILICON NANOCRYSTAL COLLOID VIA A HIGH-TEMPERATURE AEROSOL REACTION |
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| Author(s): LITTAU KA, SZAJOWSKI PJ, MULLER AJ, KORTAN AR, BRUS LE |
| Source: JOURNAL OF PHYSICAL CHEMISTRY Volume: 97 Issue: 6 Pages: 1224-1230 Published: FEB 11 1993 |
| Times Cited: 334 References: 46 |
| Abstract: We describe a high-temperature aerosol apparatus for the synthesis of 3-8-nm, surface-oxidized Si crystallites. The particles are made by homogeneous gas-phase nucleation following pyrolysis of dilute disilane in He. The particles are collected as a robust ethylene glycol colloid, and characterized by transmission electron microscopy, X-ray powder Bragg scattering, IR, high-pressure liquid chromatography, and optical spectroscopy. The particles exhibit a shell structure, with a crystalline Si core, of bulk lattice constant, capped with an approximately 1.2-nm shell of silicon dioxide. After acidic reflux, the particles luminesce with 5% net quantum yield. As the Si core decreases to about 2 nm the emission shifts 0.5 eV above the bulk Si band pp. This red luminescence appears consistent with a predicted quantum size effect in crystalline silicon. |
| Document Type: Article |
| Language: English |
Addresses:
1. AT&T BELL LABS, MURRAY HILL, NJ 07974 USA |
| Publisher: AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 |
| Subject Category: Chemistry, Physical |
| IDS Number: KL860 |
| ISSN: 0022-3654 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |