Study of Biological Molecules in Water by Using the Resonance Raman Spectra in Liquid-Core Optical Fiber
JIA Li-hua1, WANG Yi-ding1, SUN Cheng-lin2, 3*, LI Zhan-long2, LI Zuo-wei2, WANG Li-jun3
1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China 2. Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, College of Physics, Jilin University, Changchun 130023, China 3. Lab of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033, China
Abstract：Raman spectrum is an important and effective method for the study of biological molecules in water. Measuring the Raman spectra for biological molecules in water, however, is very difficult because of the small Raman scattering cross section and the high electronic excitation energy of water molecules. In the present paper, the authors applied both technologies of liquid-core optical fiber and the resonance Raman spectra, then the intensity of Raman spectra was enhanced to a great extent. In this experiment, we chose the laser wavelength 514.5 of Ar+ ion laser as excitation laser, because we could obtain the maximal intensity of resonance Raman spectra at this wavelength. The experiment results show that, for the trace inspecting study of β-carotene biological molecules in water, the concentration in the range of 10-7-10-9 mol·L-1 can be detected by quartz liquid-core optical fiber and the concentration in the range of 10-9-10-10 mol·L-1 by Teflon liquid-core optical fiber. The detecting utmost will be further reduced if improving the quality of optical fiber.
贾丽华1,王一丁1,孙成林2, 3*,李占龙2,里佐威2,王立军3 . 液芯光纤共振拉曼光谱法检测水中生物分子研究[J]. 光谱学与光谱分析, 2009, 29(10): 2686-2688.
JIA Li-hua1, WANG Yi-ding1, SUN Cheng-lin2, 3*, LI Zhan-long2, LI Zuo-wei2, WANG Li-jun3 . Study of Biological Molecules in Water by Using the Resonance Raman Spectra in Liquid-Core Optical Fiber. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(10): 2686-2688.
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