Kim, Myoung-Ha and Kim, Il-Soo and Park, Yong-Hee and Park, Tae-Eon and Shin, Jung H. and Choi, Heon-Jin (2009) Platinum Assisted Vapor–Liquid–Solid Growth of Er–Si Nanowires and Their Optical Properties. Nanoscale Research Letters, 5 (2). pp. 286-290. ISSN 1931-7573 (Print) 1556-276X (Online)
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Official URL: http://www.springerlink.com/content/k4q58143170674...
We report the optical activation of erbium coated silicon nanowires (Er–SiNWs) grown with the assist of platinum (Pt) and gold (Au), respectively. The NWs were grown on Si substrates by using a chemical vapor transport process using SiCl4 and ErCl4 as precursors. Pt as well as Au worked successfully as vapor–liquid–solid (VLS) catalysts for growing SiNWs with diameters of ~100 nm and length of several micrometers, respectively. The SiNWs have core–shell structures where the Er-crystalline layer is sandwiched between silica layers. Photoluminescence spectra analyses showed the optical activity of SiNWs from both Pt and Au. A stronger Er3+ luminescence of 1,534 nm was observed from the SiNWs with Pt at room- and low-temperature (25 K) using the 488- and/or 477-nm line of an Ar laser that may be due to the uniform incorporation of more Er ions into NWs with the exclusion of the formation of catalyst-induced deep levels in the band-gap. Pt would be used as a VLS catalyst for high performance optically active Er–SiNWs.
|Uncontrolled Keywords:||Si nanowires - Erbium - Luminescence - Platinum catalyst|
|Subjects:||Material Science > Nanofabrication processes and tools|
Physical Science > Photonics
|Deposited By:||Lesley Tobin|
|Deposited On:||21 Jan 2010 15:51|
|Last Modified:||21 Jan 2010 15:51|
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