CAS OpenIR  > 中科院上海应用物理研究所2011-2020年
Control of crystallographic orientation in diamond synthesis through laser resonant vibrational excitation of precursor molecules
Xie, ZQ; Bai, J; Zhou, YS; Gao, Y; Park, J; Guillemet, T; Jiang, L; Zeng, XC; Lu, YF; xzeng1@unl.edu; ylu2@unl.edu
2014
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume4
AbstractCrystallographic orientations determine the optical, electrical, mechanical, and thermal properties of crystals. Control of crystallographic orientations has been studied by changing the growth parameters, including temperature, pressure, proportion of precursors, and surface conditions. However, molecular dynamic mechanisms underlying these controls remain largely unknown. Here we achieved control of crystallographic orientations in diamond growth through a joint experimental and theoretical study of laser resonant vibrational excitation of precursor molecules (ethylene). Resonant vibrational excitation of the ethylene molecules using a wavelength-tunable CO2 laser steers the chemical reactions and promotes proportion of intermediate oxide species, which results in preferential growth of {100}-oriented diamond films and diamond single crystals in open air. Quantum molecular dynamic simulations and calculations of chemisorption energies of radicals detected from our mass-spectroscopy experiment provide an in-depth understanding of molecular reaction mechanisms in the steering of chemical reactions and control of crystallographic orientations. This finding opens up a new avenue for controlled chemical vapor deposition of crystals through resonant vibrational excitations to steer surface chemistry.
KeywordChemical-vapor-deposition Cvd Diamond Films Growth Nitrogen Nucleation Surfaces Defects Texture Silicon
Indexed BySCI
Language英语
WOS IDWOS:000333797300008
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14053
Collection中科院上海应用物理研究所2011-2020年
Corresponding Authorxzeng1@unl.edu; ylu2@unl.edu
Recommended Citation
GB/T 7714
Xie, ZQ,Bai, J,Zhou, YS,et al. Control of crystallographic orientation in diamond synthesis through laser resonant vibrational excitation of precursor molecules[J]. SCIENTIFIC REPORTS,2014,4.
APA Xie, ZQ.,Bai, J.,Zhou, YS.,Gao, Y.,Park, J.,...&ylu2@unl.edu.(2014).Control of crystallographic orientation in diamond synthesis through laser resonant vibrational excitation of precursor molecules.SCIENTIFIC REPORTS,4.
MLA Xie, ZQ,et al."Control of crystallographic orientation in diamond synthesis through laser resonant vibrational excitation of precursor molecules".SCIENTIFIC REPORTS 4(2014).
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