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Raman spectroscopic investigation of solid samples using a low-repetition-rate pulsed Nd : YAG laser as the excitation source
Zhang, Jing; Feng, Zhaochi; Li, Meijun; Chen, Jun; Xu, Qian; Lian, Yuxiang; Li, Can
关键词Low-repetition-rate Pulsed Laser Uv Raman Spectroscopy Raman Spectroscopy Thermal Damage
刊名APPLIED SPECTROSCOPY
2007
61期:1页:38-47
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Instruments & Instrumentation ; Spectroscopy
研究领域[WOS]Instruments & Instrumentation ; Spectroscopy
关键词[WOS]PHASE-TRANSFORMATION ; SUPPORTED VANADIUM ; SURFACE REGION ; ZIRCONIA ; CATALYSTS ; ANATASE ; SATURATION ; SPECTRA ; RUTILE
英文摘要We tried to investigate the possibility of using a low-repetition-rate pulsed Nd:YAG laser as an excitation source in Raman measurements for solid samples. Based on the results from the Raman spectra excited by continuous wave (CW) 532 and 325 nm lasers, we studied the influence of laser energy and irradiation time of 532 and 355 nm pulsed Nd:YAG lasers (10 Hz repetition rate) on the thermal stability of (NH4)(6)Mo7O24 center dot 4H(2)O, NH4VO3, and Ce(NO3)(3)center dot 6H(2)O samples, which usually decompose at relatively low temperatures. It is observed that the heating temperature estimated at these samples caused by the irradiation of 532 nm pulsed laser with 22 mJ is no higher than 100 degrees C even for 60 min exposure. The 355 nm pulsed laser with energies below 8.0 mJ hardly causes thermal damage to hydrated (NH4)(6)Mo7O24 and hydrated Ce(NO3)(3) samples. However, a 355 nm pulsed laser with only 2.2 mJ causes heating temperatures as high as 200 degrees C in the NH4VO3 sample. These great differences should be attributed to the electronic absorbance of the above three samples at 355 ran. We also found that a 532 nm pulsed laser with even 22 mJ and a 355 ran pulsed laser with even 8.0 mJ do not cause the phase transition of TiO2 and ZrO2, Whose phase transformation easily takes place at elevated temperatures, but pulsed lasers could remove some oxygen atoms from these samples. In addition, for L-alanine and DL-beta-phenylalanine biological samples, it is surprisingly found that they are not damaged by the 355 nm pulsed laser even when the laser energy is increased to 8.0 mJ, possibly because they do not absorb the 355 nm laser. Based on these results, it is demonstrated that low-repetition-rate pulsed lasers with appropriate wavelength and energy can be employed as the excitation sources of Raman spectroscopy for characterizing some solid samples, even the thermally unstable samples.
语种英语
WOS记录号WOS:000243857100007
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140398
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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GB/T 7714
Zhang, Jing,Feng, Zhaochi,Li, Meijun,et al. Raman spectroscopic investigation of solid samples using a low-repetition-rate pulsed Nd : YAG laser as the excitation source[J]. APPLIED SPECTROSCOPY,2007,61(1):38-47.
APA Zhang, Jing.,Feng, Zhaochi.,Li, Meijun.,Chen, Jun.,Xu, Qian.,...&Li, Can.(2007).Raman spectroscopic investigation of solid samples using a low-repetition-rate pulsed Nd : YAG laser as the excitation source.APPLIED SPECTROSCOPY,61(1),38-47.
MLA Zhang, Jing,et al."Raman spectroscopic investigation of solid samples using a low-repetition-rate pulsed Nd : YAG laser as the excitation source".APPLIED SPECTROSCOPY 61.1(2007):38-47.
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