A NEW FORM OF LUMINESCENT SILICON - SYNTHESIS OF SILICON NANOCLUSTERS IN ZEOLITE-Y

Date

1994-01-01

Author

DAG, O
KUPERMAN, A
MACDONALD, PM
OZIN, GA

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

201
views

0
downloads

The chemical vapor deposition (CVD) of disilane within the diamond lattice of 13 Angstrom supercages in the acid farm of zeolite Y (HY) has been employed to assemble an array of silicon nanoclusters. In this process, Si2H6 molecules are reactively anchored to Bronsted acid sites in dehydrated HY. This reaction is quantitative as indicated by the disappearance of characteristic nu OH modes in FTIR spectra. Controlled thermal treatment of these samples in a closed system induces a series of H-2 elimination reactions to yield encapsulated ''capped'' silicon nanoclusters. The resulting materials are air and water stable and display orange-red photoluminescence at room temperature. The intensity of this photoluminescence is temperature dependent and proportional to disilane loading. The optical absorption-edges of these materials display red-shifts with increasing disilane loading. They display no temperature dependence and are blue-shifted with respect to bulk silicon.

Subject Keywords

VISIBLE LUMINESCENCE, ROOM-TEMPERATURE, LIGHT-EMISSION, POROUS SILICON, WAFERS, ALLOYS, SI

URI

https://hdl.handle.net/11511/67738

DOI

https://doi.org/10.1016/s0167-2991(08)63648-4

Collections

Department of Chemistry, Conference / Seminar

Suggestions

OpenMETU
Core

A new soluble conducting polymer and its electrochromic devices YİLDİZ, UMİT HAKAN; SAHİN, ELİF; Akhmedov, IM; Tanyeli, Cihangir; Toppare, Levent Kamil (Wiley, 2006-04-01) A new polythiophene derivative was synthesized by both chemical and electrochemical oxidative polymerization of 1-(1-phenylethyl)-2,5-di(2-thienyl)-1H-pyrrole (PETPy). Of which the chemical method produces a polymer that is completely soluble in organic solvents. The structures of both the monomer and the soluble polymer were elucidated by nuclear magnetic resonance (H-1 and C-13 NMR) and Fourier transform infrared (FTIR) spectroscopy. The average molecular weight has been determined by gel permeation chrom...
A novel experimental and density functional theory study on palladium and nitrogen doped few layer graphene surface towards glucose adsorption and electrooxidation Caglar, Aykut; Duzenli, Derya; Önal, Işık; Tezsevin, Ilker; Sahin, Ozlem; Demir Kıvrak, Hilal (Elsevier BV, 2021-03-01) At present, few layer graphene (G) and nitrogen doped few layer graphene (N doped-G) are firstly coated on Cu foil via chemical vapor deposition (CVD) method and G and N doped-G coated Cu foil is transferred to the indium tin oxide (ITO) substrate surface to obtain electrodes. Pd metal is electrodeposited onto the N doped-G/ITO electrode (Pd-N doped-G/ITO). Pd-N doped-G/ITO electrode are characterized with advanced surface characterization methods such as Raman spectroscopy and SEM-EDX. Characterization res...
AN EFFICIENT SYNTHESIS OF SUBSTITUTED 2H-PYRAN-2-ONE DERIVATIVES VIA THE CONJUGATED ADDITION OF THE ENOLATES OF CARBONYL-COMPOUNDS TO ENAMINOESTERS DEMIR, AS; Tanyeli, Cihangir; URKMEZKARAASLAN, R; SAYRAC, T (Informa UK Limited, 1991-01-01) Short simple synthesis of alkenoic acid esters and their intramolecular cyclization products, 2H-Pyran-2-ones from enolates of carbonyl compounds and enaminoesters are described.
Direct hydrothermal synthesis of palladium-incorporated silicate-structured mesoporous catalysts Sener, Canan; Doğu, Timur; Dogu, Guelsen (2007-01-01) Pd-Si-structured novel mesoporous nanocomposite catalytic materials, having quite high Pd/Si ratios, were synthesized by an acidic direct hydrothermal synthesis route. The nanocomposite catalytic materials were then characterized by XRD, XPS, EDS, nitrogen adsorption, and SEM techniques. Unlike MCM-41, the XRD patterns indicated a rather wide d((100)) band at a 2 theta value of about 1.9. The materials, with very high Pd/Si wt ratios between 1.43 and 2.66, were synthesized and had BJH surface area values be...
A facile synthesis of various butenolides Tanyeli, Cihangir (Informa UK Limited, 2000-01-01) The synthesis of alpha'-acyloxy-alpha,beta-unsaturated cyclic ketones from the corresponding alpha,beta-unsaturated cyclic ketones by using manganese (III) acetate in combination with 2-chloropropionic acid followed by subsequent Arbuzov and intramolecular Horner-Emmons cyclization reactions provided a convenient synthetic pathway to various butenolides 4a-d.

Citation Formats

O. DAG, A. KUPERMAN, P. MACDONALD, and G. OZIN, “A NEW FORM OF LUMINESCENT SILICON - SYNTHESIS OF SILICON NANOCLUSTERS IN ZEOLITE-Y,” GARMISCH PARTENKIR, GERMANY, 1994, vol. 84, p. 1107, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67738.