10 March 2019, Volume 31 Issue 1
    

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    Overview
  • Recent Advances in Biomedical Applications of Dual-Modality Photoacoustic/Ultrasound Imaging Technology
    HUANG Doudou, QIU Qi, LIN Wenzhen, LIU Jiyan, HUANG Yali, ZHAO Qingliang
    Chinese Journal of Light Scattering. 2019, 31(1): 1-10. https://doi.org/10.13883/j.issn1004-5929.201901001
    Abstract ( ) Download PDF ( ) Knowledge map Save
    With the rapid development of laser technology,computer technology and the improvement of image processing and analysis technology,the biomedical image with a single mode is heading toward multimode,and its scale is undergoing a revolutionary transformation.Multi-modality imaging technology can not only realize the multi-angle,multi-parameter structure and function of the same organism and the extraction of comprehensive feature information at the molecular level,but also make up for the deficiency of single mode.In this way,it can improve the accuracy of early detection of diseases and provide patients with more economical,reasonable,accurate and effective treatment plans,which is of great clinical significance for improving people's quality of life.This paper focuses on the application and new progress of photoacoustic/ultrasound dual-mode imaging technology in biomedical field and brain-related diseases.Systematically discusses the prospect of this fusion technology in the future biomedical field.
  • Research Progress in Structural Colors of Nano Resonant Cell Arrays
    PAN Haining, CHEN Yihang
    Chinese Journal of Light Scattering. 2019, 31(1): 11-18. https://doi.org/10.13883/j.issn1004-5929.20190102
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    Nanostructural color is produced by the interaction of visible light and nanostructure.In order to analyze different nanometer resonant cell arrays control characteristics for visible light,the paper summarizes the mechanisms and filtering effect of several plasmon structures including:nano-grating,Metal-insulator-Metal(MIM),subwavelength hole arrays,and nano-rod array,the array of nano disc-apertures.At the same time two kinds of Mie resonant nanostructural colors of pure silicon and non-pure silicon are introduced.In addition,the article also discusses the method of dynamic structural color's realization and the method of nanostructures' large-area preparation,so that structural color based on plasmon and Mie resonance can be applied to the real world.The nanostructure has excellent color rendering effect and can be integrated into the optoelectronic device,which has great application value in the fields of ultra high resolution display,image information storage and image information encryption.
    • Surface Enhanced Raman Scattering（SERS）
  • Rapid Detection of Saccharin Sodium in Pastry and Liquor by Surface-Enhanced Raman Spectroscopy
    QIN Wenxia, YU Wansong, ZHENG Juanmei, YUAN Guangwei, WANG Haibo, LIU Jialing
    Chinese Journal of Light Scattering. 2019, 31(1): 19-25. https://doi.org/10.13883/j.issn1004-5929.20190103
    Abstract ( ) Download PDF ( ) Knowledge map Save
    A method for rapid determination of saccharin sodium in pastry and liquor was established by surface-enhanced Raman spectroscopy (SERS).Based on the solvent extraction method,dichloromethane was used to extract saccharin sodium from pastry and liquor.The concentrated gold colloid was prepared to use as Raman substrate,and the conditions of substrate was optimized.The results showed that saccharin sodium was extracted with dichloromethane under the acidic condition of 1 mol/L HCl,and saccharin sodium was back-extracted with 0.1 mol/L NaOH solution through adjusting the acidity of the system.When 1.0 mol/L HNO3 was used as coagulant to combine the concentrated gold colloid with saccharin sodium,the SERS signal with the strongest response could be obtained.The LOD of saccharin sodium in pastry and liquor were 0.5 mg/kg and 0.5mg/L respectively.And the recovery rate was between 75%~120% and RSD (n=5) was between 3.3~8.6%.So this method can be used for the rapid determination of saccharin sodium in pastry and liquor with the merit of high sensitivity,strong specificity and simple pretreatment method.
  • Establishment and Application of Novel Packed Column-Surface-Enhanced Raman Spectroscopy Method
    SHI Yi, CHEN Wei
    Chinese Journal of Light Scattering. 2019, 31(1): 26-30. https://doi.org/10.13883/j.issn1004-5929.20190104
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The method of novel packed column modified by metal organic frameworks combing with surface-enhanced Raman spectroscopy was established based on the high specific surface area and excellent adsorption properties of metal organic frameworks.A novel packed column with enhanced Raman signal function was prepared by metal organic frameworks combined with conventional chromatography silica gel.Then,in-situ detection was used to identify the adulteration of Chinese medicinal materials.Two dyes in dyed Croci Stigma were successfully detected by established method.The results show that the method of novel packed column-surface-enhanced Raman spectroscopy can be used to detect the dyed Chinese materials.In addition,the method has been proved to be simple,fast and sensitive,and has a wide application prospects.
    • Applications in Material Researches
  • Micro-vibrational Spectroscopy of Tabular Beryl from Xuebaoding
    WANG Ping, GAO Fuhua
    Chinese Journal of Light Scattering. 2019, 31(1): 31-37. https://doi.org/10.13883/j.issn1004-5929.20190105
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    The beryl from Xuebaoding,Mianyang,Sichuan,China has attracted much attention because of its unique transparent tabular shape.However,there are still different opinions about the real reason of the tabular shape.In this study,the micro-vibrational spectroscopy combined with quantitative chemical component is used to analyze the Xuebaoding beryl further.The micro-IR mapping shows that there are not only water molecules but also water-Fe3+ ions and carbon dioxides in the channel.They distribute unevenly in the crystal.Element substitution between Li and Be will cause structural distortion of Be-O tetrahedron and Al-O octahedron which can be reflected as the lattice vibrational bands blue-shift in the Raman spectroscopy.Meanwhile,the stretch mode band of water molecule shows red-shift in Raman spectroscopy because of the reduced polarizability caused by combining with Na+ in the channel.This study provides not only a further understanding for exploring the genesis of the tabular habit of Xuebaoding beryl,but also a reference for studying the quantum state of a single water molecule.
  • Quantum Chemistry ab initio Study on Fine Structure and Raman-Active Molecular Vibration of Sodium Titanosilicates
    HE Yingxia, YOU Jinglin, WANG Jian, MA Nan, WU Zhidong, YANG Yejin
    Chinese Journal of Light Scattering. 2019, 31(1): 38-44. https://doi.org/10.13883/j.issn1004-5929.20190106
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    Raman vibrational wavenumber and scattering activity of the sodium titanosilicates with various compositions were calculated by quantum chemistry ab initio calculation method.The effect of the local microscopic environment of the silicon-oxygen tetrahedron (SiO4) on the vibrational Raman wavenumbers was studied.Stress index of tetrahedron (SIT) was promoted and modifieded to analyze the symmetric stretching vibrational wavenumber of NBO (non-bridging oxygen),which appeared to increase linearly with the corresponding SIT in the high wavenumber range.Raman spectroscopy and 29Si NMR were applied to make the quantitative analysis of Na2TiSiO5 glass,and the spectral peak around 869 cm-1 was assigned to the symmetric stretching vibration of NBO of Q1 species of silicon-oxygen tetrahedron.
    • Instruments and Methods
  • Measurement of the Volume Scattering Function of Dual Particle Based on Microfluidic Chip Capture Technology
    WANG Kuan, XIA Min, YU Long, LI Wei, GUO Wenping, YANG Kecheng
    Chinese Journal of Light Scattering. 2019, 31(1): 45-53. https://doi.org/10.13883/j.issn1004-5929.20190107
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    In this work,a new approach to measuring the volume scattering function of dual microspheres in a wide angular range is developed.The polydimethylsiloxane microfluidic chip is designed by the simulation of COMSOL,and is supposed to capture dual particles efficiently.After refractive index matching of microfluidic and the chip,this system can measure scattering light from 1° to 170° in a continuous way.Standard polystyrene particles with a size of 23.75 μm,31.10 μm,and 40.01 μm are used as experimental samples.The high stability of the capture and the good repeatability of the experiment makes it having great potential in the study of the volume scattering function.
    • Applications in Chemistry and Biology Researches
  • Determination of Hydralazine Hydrochloride in Pharmaceuticals Based on Resonance Light Scattering Spectrometry
    MOU Chengjian, WANG Zhen, XU Zhongyuan, LI Yinhua, MA Weixing, LI Shu'an
    Chinese Journal of Light Scattering. 2019, 31(1): 54-59. https://doi.org/10.13883/j.issn1004-5929.20190108
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    In order to study the new method for the determination of hydralazine hydrochloride in pharmaceuticals,the light scattering intensity parameters of the reaction between hydralazine hydrochloride and sodium dodecyl benzene sulfonate were studied using the resonance light scattering spectrometry in Clark-Lubs buffer medium.The results showed that the reaction between the proper amount of hydrazinium hydrochloride and sodium dodecyl benzene sulfonate aqueous solution in the pH 1.4 Clark-Lubs buffer medium was π-π charge transfer and ion association reaction mechanism.The maximum emission wavelength of the resonance light scattering of the obtained product at 402 nm.The hydralazine hydrochloride concentration was linear in the range of 0.125 to 1.00 mg·L-1.The correlation coefficient R was 0.9998.The detection limit was 0.035 mg·L-1,and the recovery rate was 99.08~100.8%.The proposed method is suitable for analyzing the parametric relationship between hydralazine hydrochloride and light scattering intensity at room temperature,and can be applied to the determination of hydralazine hydrochloride in medicines.
  • Non Destructive in Situ Characterization of Pigments on a Picture of Qing Watercolors on Pith
    ZHANG Chan
    Chinese Journal of Light Scattering. 2019, 31(1): 60-65. https://doi.org/10.13883/j.issn1004-5929.20190109
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    In this paper,pigments of a piece of Qing watercolors on Pith were tested by laser Raman spectrometer and super depth microscopy.The analysis indicate that the chromogenic substances of red pigment is minium,the chromogenic substances of blue pigment is ultramarine,the chromogenic substances of black pigment is carbon black,the chromogenic substances of white pigments are calcite and hydrocerussite,the chromogenic substances of green pigments are malachite and emerald green.The chromogenic substances of yellow pigments needs further testing.Ultramarine and emerald green are synthetic pigments and the first synthesis time was 1830 and 1814 respectively.Emerald green was not used in Chinese painting until the 1950s,and it was concluded that this piece of Qing watercolors on pith was possibly drawn after the middle and late Qing Dynasty.This study shows that LRS is ideal and powerful tools for nondestructive identification of pigments on Qing watercolors on pith due to the plant cell structure of the Qing watercolors on pith paper and the particularity of cultural relics.The technique has broad application in preservation and restoration of cultural relics.
  • Analysis on Heavy Mineral Oil by Infrared Spectroscopy and Raman Spectroscopy
    JU Chenyang, WANG Jifen, YU Jing
    Chinese Journal of Light Scattering. 2019, 31(1): 66-74. https://doi.org/10.13883/j.issn1004-5929.20190110
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    Heavy mineral oil is one of the common trace physical evidence at the scene of the crime.The rapid and accurate identification of heavy mineral oil can provide a direction for case detection and narrow the scope of investigation.this paper analyzed 69 heavy mineral oil samples by Fourier transform infrared spectroscopy and Raman spectroscopy,finding that not only different kinds of heavy mineral oil spectra vary,even the same type of different manufacturer of heavy mineral oil spectra also have differences.The results show that the combination of infrared spectrometry and Raman spectrometry can distinguish the heavy mineral oil samples and have good results.
  • Study on the Structure and Vibrational Spectra of Vincamine by Density Functional Theory
    YANG Yunhan, DU Yao, LI Fenji, YANG Junli, WEI Keke, XIA Futing, LI Yanhua, YANG Lijuan
    Chinese Journal of Light Scattering. 2019, 31(1): 75-82. https://doi.org/10.13883/j.issn1004-5929.20190111
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The molecular structure of vincamine was optimized by density functional theory(DFT) B3LYP,B3PW91,MPW1PW91,PBE1PBE,PBEPBE methods with 6-311++G(2d,2p) basis set.The geometric parameters,infrared absorption spectrum,frontier molecular orbital,energy gap and thermodynamic parameters of vincamine were calculated and analyzed.In addition,the infrared absorption spectrum of vincamine was determined by pellet technique method.The results show that the molecular structure of vincamine is similar to that of X single crystal,and the theoretical infrared absorption spectrum is consistent with the experimental results.There are 150 vibration modes under the five theoretical levels.The frontier orbital theory analysis shows that the ability of the vincamine molecule to obtain electrons is strong.This study can provide a theoretical reference for the structural analysis,spectral analysis and quantitative structure-activity relationship of vincamine.
    • Other Optical Spectroscopic Techniques and Applications
  • Synthesis and Luminescence Properties of Eu3+-Doped Ca8Zn(SiO4)4Cl2 Red Phosphors
    FU Qiuping, XIONG Li, YANG Lian, LIU Yuan
    Chinese Journal of Light Scattering. 2019, 31(1): 83-87. https://doi.org/10.13883/j.issn1004-5929.20190112
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    A series of Ca8Zn(SiO4)4Cl2:Eu3+red phosphors were prepared by sol-gel method.The as-prepared samples Ca8Zn(SiO4)4Cl2:Eu3+were tested by the X-ray powder diffraction (XRD) and photoluminescence spectrometer.The effects of sintering temperature and content of Eu3+ on the emission intensity of the sample were investigated.The results show that the phosphors can be efficiently excited in a near-ultraviolet (NUV) light of 393 nm.The most intensive emission intensity of the Ca8Zn(SiO4)4Cl2:Eu3+ phosphors,which is prepared at the sintering temperature of 800 ℃ and the Eu3+ doping concentration of 5.0 mol%,can be obtained.The chromaticity coordinates of the Ca8Zn(SiO4)4Cl2:Eu3+ phosphors are (0.684,0.316),which is near the standard value of red phosphor (x=0.670,y=0.330).Ca8Zn(SiO4)4Cl2:Eu3+ is a promising red phosphor for white-LED.
  • Analysis on the Near Infrared Identification of Two Kinds of Hongmu Furniture by the Influence of Paint Coating
    ZHAO Xiaojun, GU Yuqi, Wang Peixin, SHOU Guozhong, QIAN Mengbo
    Chinese Journal of Light Scattering. 2019, 31(1): 88-93. https://doi.org/10.13883/j.issn1004-5929.20190113
    Abstract ( ) Download PDF ( ) Knowledge map Save
    It's a common phenomenon that shoddy and deceptive the hongmu furniture is filled with all markets.It's so hard for consumers to identify the species of the hongmu furniture.There are many studies on the application of near infrared spectroscopy classification of wood species.But for the finished furniture,the surface decoration is the biggest problem to classify the hongmu furniture.So this paper analyzes the spectral characteristics of wood covered by different kinds of paints and proposes a method which is combined with Principal Component Analysis (PCA) and Back Propagation Neural Networks by using near infrared spectroscopy.We firstly collected spectral data from Dalbergia cochinchinensis and Dalbergia retusa which are usuaslly confusing hongmu furniture species in the market,and compered the spectral difference of hongmu and the hongmu furniture.Secondly,reflection spectra were preprocessed by taking SNV to remove irrelevant information and noise.Finally,principal component analysis was used to distill initial feature vectors and asbilish new sample's feature vectors according to cumulate reliability.Then,we chose the new feature vectors which its cumulate reliability is more than 95%.A three layer probabilistic neural network was designed.Results show that recognition rates of these three species of hongmu furniture are 92.59% and 94.38%.So our approach provides an new and reliable method for the identification of hongmu furniture.
  • Recognition of Honeysuckle Varieties and Geographical Origin Based on Stepwise Discrimination Analysis Combining Infrared Spectroscopy
    YANG Chunyan, LIU Fei, HUNGFU Yijing, LIU Mei
    Chinese Journal of Light Scattering. 2019, 31(1): 94-100. https://doi.org/10.13883/j.issn1004-5929.20190114
    Abstract ( ) Download PDF ( ) Knowledge map Save
    The Fourier Transform Infrared Spectroscopy of 150 Honeysuckle specimens of nine varieties collected from five regions were obtained to discriminate the sample variety and geographical origin.All specimens were randomly divided into a training set and a validation set.The discrimination analysis based on the original spectra,first-derivate spectra and second-derivate spectra revealed that the model based on the second-derivate spectra has the highest accuracy,and the model based on the waveband of 1800～900 cm-1 was better than that of 1500～700 cm-1 and 1200～700 cm-1,which yielded correct rate of 93.20% for distinguishing variety and 96.13% for identifying origin.The study demonstrated that Fourier Transform Infrared Spectroscopy combining with discrimination analysis might be used as an effective way to distinguish Honeysuckle variety and origins.
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