1 河北工程大学数理科学与工程学院，河北 邯郸 056038
2 河北省计算光学成像与光电检测技术创新中心，河北 邯郸 056038
3 河北省计算光学成像与智能感测国际联合研究中心，河北 邯郸 056038
表面增强拉曼散射（SERS）是一种非接触式、无损伤、高灵敏的光谱分析技术，具备分子指纹识别能力，在材料学、化学、物理学、地质学和生命科学等学科有着广泛的应用。相较于传统的刚性基底，柔性SERS基底能够对非平面表面的分析物进行原位检测和现场实时检测。然而，设计和制备高灵敏、高重现性的柔性SERS基底仍存在一些挑战。因此，综述了柔性SERS基底的最新研究进展，探讨了5种不同类型柔性SERS基底的制备、性能和应用以及未来发展趋势，对SERS基底的研究具有一定指导意义。
光谱学 表面增强拉曼散射 柔性薄膜 纳米材料 快速检测 激光与光电子学进展
2024, 61(9): 0900010
天津工业大学纺织科学与工程学院 天津 300387
探究高能辐照下环氧树脂损伤降解机理，以提高环氧树脂在辐照环境下的稳定性。本研究将石墨烯量子点（GQDs）作为自由基清除剂，减缓γ辐照环境下环氧树脂的降解，并研究了GQDs对环氧树脂抗辐照性能的影响机制。结果表明：经过辐照后环氧树脂力学性能下降49%，玻璃化转变温度下降4.4 ℃；石墨烯量子点/环氧树脂（GQDs/EP）复合材料的力学性能下降35%，玻璃化转变温度下降2.2 ℃；GQDs的引入使得辐照后的GQDs/EP复合材料产生的自由基含量显著低于纯树脂自由基的含量。GQDs纳米颗粒也改善了辐照前后环氧树脂的力学性能和热学稳定性。因此，GQDs纳米颗粒可以作为自由基清除剂，有效地提高环氧树脂的辐照稳定性。GQDs清除自由基机制与sp2碳域和表面的官能团有密切相关。本研究为提高环氧树脂在γ射线辐照下的稳定性提供了新的思路和方法。
环氧树脂 纳米颗粒 抗辐照性能 Epoxy resin Nanomaterials Radiation resistance 辐射研究与辐射工艺学报
2024, 42(1): 010205
Author Affiliations
Abstract
1 Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan University Chengdu 610064, Sichuan, P. R. China
2 Research Center of Analytical Instrumentation, School of Mechanical Engineering, Sichuan University, Chengdu 610064, Sichuan, P. R. China
3 Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064, Sichuan, P. R. China
4 State Key Laboratory of Membrane Biology, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, P. R. China
Laser spectroscopic imaging techniques have received tremendous attention in the field of cancer diagnosis due to their high sensitivity, high temporal resolution, and short acquisition time. However, the limited tissue penetration of the laser is still a challenge for the in vivo diagnosis of deep-seated lesions. Nanomaterials have been universally integrated with spectroscopic imaging techniques for deeper cancer diagnosis in vivo. The components, morphology, and sizes of nanomaterials are delicately designed, which could realize cancer diagnosis in vivo or in situ. Considering the enhanced signal emitting from the nanomaterials, we emphasized their combination with spectroscopic imaging techniques for cancer diagnosis, like the surface-enhanced Raman scattering (SERS), photoacoustic, fluorescence, and laser-induced breakdown spectroscopy (LIBS). Applications of the above spectroscopic techniques offer new prospects for cancer diagnosis.
Laser spectroscopy tumor imaging tumor diagnosis nanomaterials Journal of Innovative Optical Health Sciences
2024, 17(1): 2330008
Author Affiliations
Abstract
1 College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China
2 College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China
The pandemic of respiratory diseases enlightened people that monitoring respiration has promising prospects in averting many fatalities by tracking the development of diseases. However, the response speed of current optical fiber sensors is still insufficient to meet the requirements of high-frequency respiratory detection during respiratory failure. Here, a scheme for a fast and stable tachypnea monitor is proposed utilizing a water-soluble C60-Lys ion compound as functional material for the tracking of humidity change in the progression of breath. The polarization of C60-Lys can be tuned by the ambient relative humidity change, and an apparent refractive index alteration can be detected due to the small size effect. In our experiments, C60-Lys is conformally and uniformly deposited on the surface of a tilted fiber Bragg grating (TFBG) to fabricate an ultra-fast-response, high-sensitivity, and long-term stable optical fiber humidity sensor. A relative humidity (RH) detecting sensitivity of 0.080 dB/% RH and the equilibrium response time and recovery time of 1.85 s and 1.58 s are observed, respectively. Also, a linear relation is detected between the resonance intensity of the TFBG and the environment RH. In a practical breath monitoring experiment, the instantaneous response time and recovery time are measured as 40 ms and 41 ms, respectively, during a 1.5 Hz fast breath process. Furthermore, an excellent time stability and high repeatability are exhibited in experiments conducted over a range of 7 days.
humidity sensor fullerene derivative optical fiber sensing tilted fiber Bragg grating nanomaterials Chinese Optics Letters
2024, 22(2): 021201
1 浙江大学材料科学与工程学院，浙江 杭州 310027
2 浙江大学现代光学仪器国家重点实验室，浙江 杭州 310027
等离激元纳米材料的光致发光已经成为等离激元的一个基本性质。近20年来，这一现象在各种不同结构、不同材料的等离激元材料中被观察到。本文简要介绍了等离激元光致发光的实验研究进展，重点讨论了目前所提出的等离激元光致发光中的几种代表类型，并对这些不同类型的光致发光的光物理过程进行了简要的分析。在此基础上，本文介绍了近年来等离激元材料光致发光在传感、生物成像等领域的前沿应用。最后，本文简要总结了等离激元材料光致发光的研究进展和所面临的问题，并对这一光物理过程以及未来的研究方向进行总结和展望。
等离激元 光致发光 跃迁 纳米材料 激光与光电子学进展
2024, 61(3): 0316001
Author Affiliations
Abstract
MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
Silicon nanomaterials have been of immense interest in the last few decades due to their remarkable optoelectronic responses, elemental abundance, and higher biocompatibility. Two-dimensional silicon is one of the new allotropes of silicon and has many compelling properties such as quantum-confined photoluminescence, high charge carrier mobilities, anisotropic electronic and magnetic response, and non-linear optical properties. This review summarizes the recent advances in the synthesis of two-dimensional silicon nanomaterials with a range of structures (silicene, silicane, and multilayered silicon), surface ligand engineering, and corresponding optoelectronic applications.Silicon nanomaterials have been of immense interest in the last few decades due to their remarkable optoelectronic responses, elemental abundance, and higher biocompatibility. Two-dimensional silicon is one of the new allotropes of silicon and has many compelling properties such as quantum-confined photoluminescence, high charge carrier mobilities, anisotropic electronic and magnetic response, and non-linear optical properties. This review summarizes the recent advances in the synthesis of two-dimensional silicon nanomaterials with a range of structures (silicene, silicane, and multilayered silicon), surface ligand engineering, and corresponding optoelectronic applications.
two-dimensionality silicon nanomaterials synthesis surface engineering optoelectronics Journal of Semiconductors
2023, 44(4): 041101
Author Affiliations
Abstract
1 MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
2 Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
3 Guangzhou Key Lab of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, P. R. China
As an emerging hybrid imaging modality, microwave-induced thermoacoustic imaging (MTAI), using microwaves as the excitation source and ultrasonic signals as the information carrier for combining the characteristics of high contrast of electromagnetic imaging and high resolution of ultrasound imaging, has shown broad prospects in biomedical and clinical applications. The imaging contrast depends on the microwave-absorption coefficient of the endogenous imaged tissue and the injected MTAI contrast agents. With systemically introduced functional nanoparticles, MTAI contrast and sensitivity can be further improved, and enables visualization of biological processes in vivo. In recent years, functional nanoparticles for MTAI have been developed to improve the performance and application range of MTAI in biomedical applications. This paper reviews the recent progress of functional nanoparticles for MTAI and their biomedical applications. The challenges and future directions of microwave thermoacoustic imaging with functional nanoparticles in the field of translational medicine are discussed.As an emerging hybrid imaging modality, microwave-induced thermoacoustic imaging (MTAI), using microwaves as the excitation source and ultrasonic signals as the information carrier for combining the characteristics of high contrast of electromagnetic imaging and high resolution of ultrasound imaging, has shown broad prospects in biomedical and clinical applications. The imaging contrast depends on the microwave-absorption coefficient of the endogenous imaged tissue and the injected MTAI contrast agents. With systemically introduced functional nanoparticles, MTAI contrast and sensitivity can be further improved, and enables visualization of biological processes in vivo. In recent years, functional nanoparticles for MTAI have been developed to improve the performance and application range of MTAI in biomedical applications. This paper reviews the recent progress of functional nanoparticles for MTAI and their biomedical applications. The challenges and future directions of microwave thermoacoustic imaging with functional nanoparticles in the field of translational medicine are discussed.
Microwave thermoacoustic imaging nanomaterials nanoprobe Journal of Innovative Optical Health Sciences
2023, 16(2): 2230014
