caa a22 4500 47584792X CHVBK 20180406123920.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1023/A:1009099416195 doi (NATIONALLICENCE)springer-10.1023/A:1009099416195 Photoluminescence as a Function of Aggregated Size from n-Butyl-Terminated Silicon Nanoclusters [Elektronische Daten] [Chung-Sung Yang, Susan Kauzlarich, Y. Wang, Howard Lee] Photoluminescence (PL) from alkyl-terminated silicon nanocrystallites as a function of size has been studied. Ultraviolet-blue luminescence (390-410 nm) is observed from as-prepared silicon nanoclusters with diameters from 3 to 8 nm. After 1 h of annealing at 162°C in 2-methoxyethyl ether (diglyme), the λ max of PL shifts from 360 to 420 nm. High-resolution transmission electron microscopy (HRTEM) images show that individual silicon nanoparticles are fused to form pairs of nanoparticles. FTIR spectra show that the alkyl groups remain on the surface of silicon nanoparticles. As the temperature is raised to 250°C for 1 h, the PL no longer shows any peak in the visible light region. TEM images show that the silicon nanoparticles are aggregated and fused uniformly in one single dimension, to form a strip, and these strips parallel each other. When the temperature is raised to 350°C these silicon nanoparticles form a large piece of silicon textile network, showing that functionalized alkyl surface does not persist above this temperature. A strong Si-O-Si asymmetric stretching vibration appears between 1000 and 1100 cm−1 at the expense of the C-H vibrational modes and there is no more change after 3 h of annealing at 250 or 350°C. These results provide strong evidence that the PL originates from quantum confinement. Plenum Publishing Corporation, 2000 silicon nanoparticles nationallicence nanoclusters nationallicence photoluminescence nationallicence TEM nationallicence Yang Chung-Sung Department of Chemistry, University of California, One Shields Avenue, 95616, Davis, California aut Kauzlarich Susan Department of Chemistry, University of California, One Shields Avenue, 95616, Davis, California aut Wang Y. National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, 94720, Berkeley, California aut Lee Howard Lawrence Livermore National Laboratory, 7000 East Avenue, L-174, 94550, Livermore, California aut Journal of Cluster Science Kluwer Academic Publishers-Plenum Publishers 11/3(2000-09-01), 423-431 1040-7278 11:3<423 2000 11 10876 https://doi.org/10.1023/A:1009099416195 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1009099416195 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang Chung-Sung Department of Chemistry, University of California, One Shields Avenue, 95616, Davis, California aut NATIONALLICENCE 700 1- Kauzlarich Susan Department of Chemistry, University of California, One Shields Avenue, 95616, Davis, California aut NATIONALLICENCE 700 1- Wang Y. National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, 94720, Berkeley, California aut NATIONALLICENCE 700 1- Lee Howard Lawrence Livermore National Laboratory, 7000 East Avenue, L-174, 94550, Livermore, California aut NATIONALLICENCE 773 0- Journal of Cluster Science Kluwer Academic Publishers-Plenum Publishers 11/3(2000-09-01), 423-431 1040-7278 11:3<423 2000 11 10876 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer