Nano and Ultrafast Photonics
With the development of science and technology, the photophysical studies have been updated from the traditional ensemble and static observations to low dimensional down to single molecule and time-resolved heterogeneous investigations. Our research interests focus on the correlation between/among dynamics, structure and function of low dimensional photonics systems, to uncover the underlying key factors and mechanisms in regulating and improving functions, by using steady and time-resolved optical spectroscopies, single molecule imaging and tracking, molecular design and self-assembly, etc.
Research Interests
¨Nano and Ultrafast Photonics
The research interests focus on the constructing of nano photonic structural materials, investigating their unique linear and nonlinear optical properties, ultrafast dynamics and mechanisms by using steady and transient spectroscopies, single molecule/single particle imaging and dynamical analysis, then exploring their application in imaging, photoelectric conversion, and photothermal therapy, etc.
¨Photocontrollable Self-assembly Structure and Function
With the design and synthesize of novel photoresponsive molecules and complexes, we are aiming at the correlations among molecular conformation, self-assembly structure, photophysical and other unique properties, in low-dimensional self-assembly materials and molecular sensors with regulable functions.
¨Macromolecular Dynamics
The dynamics plays an important role in the functioning of biological molecules and uncovering the relationship between structure and function in life science. We are interested in exploring the dynamical mechanisms in protein-protein interaction, enzymatic reaction, protein transportation, protein folding and unfolding, and protein behavior at liquid-solid interface, using single molecule fluorescence (intensity and lifetime) imaging, tracking, fluorescence resonance energy transfer and other single- molecule techniques.
Facilities and Methods
¨Single molecule total internal reflection fluorescence microscopy (SM-TIRFM)
¨Single molecule fluorescence lifetime imaging microscopy (SM-FLIM)
¨Surface characterization (contact angle goniometry, FTIR, ellipsometry)
¨General spectroscopy (dynamical light scattering, UV-vis, fluorescence)
¨Atomic force microscopy and Raman spectroscopy (a joint instrument)
¨Time resolved fluorescence spectroscopy (consisting of time-correlated single photon counting a broad-band Femtosecond laser)
¨Femtosecond transient absorption spectroscopy
¨Material synthesis and modification
Selected recent publications:
1. Zhen-Yong Xue#, Wen-Qiang Wu#*, Xiao-Cong Zhao, Arvind Kumar, Xia Ran, Xing-Hua Zhang, Yu Zhang and Li-Jun Guo*, Single-molecule probing the duplex and G4 unwinding patterns of a RecD family helicase, International Journal of Biological Macromolecules, 2020, 164,902-910.
2. Yanmin Kuang, Xing Guo, Aiyu Guo, Xia Ran, Yulu He, Yu Zhang, Lijun Guo*, Single-molecule enzymatic reaction dynamics and mechanisms of GPX3 and TRXh9 from Arabidopsis thaliana, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2020, 243,118778:1-9.
3. Conghui Yao, Xiaojuan Wang*, Wei Zhao, Tianfeng Li, Yulu He, Xia Ran, and Lijun Guo*, Probing the facet-dependent intermediate in the visible-light degradation of RhB by carbon-coated anatase TiO2 nanoparticles, Journal of Alloys and Compounds, 2020,846, 156335:1-9.
4. Tianfeng Li#, Zhenmin Zhao#, Cheng Gu, Jicun Ma, Yanmin Kuang, Xiaojuan Wang, Yanli Mao, Xia Ran* and Lijun Guo*, CsPbBr3 Quantum Dots as Artificial Antennas to Enhance the Light-Harvesting Efficiency and Photoresponse of Zinc Porphyrin, J. Phys. Chem. C 2020, 124, 5069-5078.
5. Xia Ran, Qianqian Zhang, Yu Zhang, Jin Chen, Zhongran Wei, Yulu He* and Lijun Guo*, Probing the Electron Transfer between iLOV Protein and Ag Nanoparticles，Molecules, 2020, 25, 2544:1-11.
6. ZhongranWei, Liu He, Zhen Chi, Xia Ran*, Lijun Guo*, Two-photon Isomerization Triggers Two-photon-excited Fluorescence of an Azobenzene Derivative, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019, 206, 120-125
7. Xing Guo, Yanmin Kuang*, Sheng Wang, Zhaohan Li, Huaibin Shen and Lijun Guo*, Shell-dependent blinking behavior and fluorescence dynamics of single ZnSe/CdS core/shell quantum dots, Nanoscale, 2018, 10, 18696-18705.
8. Pan Wang#, Kuo-Fu Tseng#, Yuan Gao, Michael Cianfrocco, Lijun Guo, Weihong Qiu*, The Central Stalk Determines the Motility of Mitotic Kinesin-14 Homodimers, Current Biology, 2018, 28(14): 2302-2308.
9. Liu He, Xia Ran*, Jinxing Li, Qiongqiong Gao, Yanmin Kuang and Lijun Guo*, A highly transparent and autonomic self-healing organogel from solvent regulation based on hydrazide derivatives, J. Mater. Chem. A, 2018, 6, 16600-16609.
10. Kuo-Fu Tseng#, Pan Wang#, Yuh-Ru Julie Lee#, Joel Bowen, Allison M. Gicking, Lijun Guo, Bo Liu and Weihong Qiu*, The preprophase band-associated kinesin-14 OsKCH2 is a processive minus-end-directed microtubule motor, Nature Communications, 2018, 9:1067
11. Xia Ran, Qiongqiong Gao, Yu Zhang* and Lijun Guo*, Colorimetry and phase transition characteristics in sensing fluoride anion based on hydrazide organogelators, RSC Adv., 2017, 7, 56016-56022.
12. Qiongqiong Gao, Liu He, Yajie Li, Xia Ran* and Lijun Guo*, Controllable wettability and adhesion of superhydrophobic self-assembled surfaces based on a novel azobenzene derivative, RSC Adv., 2017, 7, 50403-50409.
13. Zhen Chi, Xia Ran*, Lili Shi, Jie Lou, Yanmin Kuang, Lijun Guo*, Molecular Characteristics of a Fluorescent Chemosensor for the Recognition of Ferric Ion Based on Photoresponsive Azobenzene Derivative, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2017,171: 25-30.
14. Beibei Xu, Xiaojuan Wang, Chaofeng Zhu, Xia Ran, Tianfeng Li* and Lijun Guo*, Probing the inhomogeneity and intermediates in the photosensitized degradation of rhodamine B by Ag3PO4 nanoparticles from an ensemble to a single molecule approach, RSC Adv., 2017, 7, 40896-40905.
15. Qiuyue Li, Zhen Chi, Tianfeng Li, Xia Ran* and Lijun Guo*, Photoresponsive behavior and switchable nonlinear optical properties of Langmuir-Blodgett film based on azobenzene derivatives, Optical Express, 2017, 25(10): 11503-11513.
16. Xia Ran, Yajie Li, Qiongqiong Gao, Weihong Qiu* and Lijun Guo*, A Smart Phase-Selective Gelator for Recycling Aromatic Solvents, the Removal of Toxic Dyes, and Molecular Delivery, Asian J. Org. Chem. 2017, 6: 95-101.
17. Yajie Li, Xia Ran*, Qiuyue Li, Qiongqiong Gao and Lijun Guo*, Water-regulated self-assembly structure transformation and gelation behavior prediction based on a hydrazide derivative, Chem. Asian J., 2016, 11, 2157-2166(cover page).
18. Xia Ran, Kun Zhang, Lili Shi, Zhen Chi, Weihong Qiu* and Lijun Guo*, Single-step fabrication of large-scale patterned honeycomb structures via self-assembly of a small organic molecule, RSC Advances, 2015, 5, 60518-60523.
19. Lili Shi#, Xia Ran#*, Yajie Li, Qiuyue Li, Weihong Qiu, and Lijun Guo*, Photoresponsive Structure Transformation and Emission Enhancement Based on a Tapered Azobenzene Gelator, RSC Advances, 2015, 5, 38283-38289.
20. Xia Ran, Haitao Wang, Lili Shi, Jie Lou, Bo Liu, Min Li and Lijun Guo*, Light-driven Fluorescence Enhancement and Self-assembled Structural Evolution of an Azobenzene Derivative, J. Mater. Chem. C, 2014, 2, 9866-9873.
21. Xia Ran, Haitao Wang, Jie Lou, Lili Shi, Bo Liu, Min Li, and Lijun Guo*, Morphology and Wettability Tunable Organogel System Based on An 1,3,4-Oxadiazole Derivative, Soft Materials, 2014, 12, 396-402.
Email: juneguo@henu.edu.cn
