Article
Chemistry, Physical
Tianze Cong, Yingying Huang, Yongpeng Zhao, Hui Huang, Dongmei Zhang, Chengwei Li, Zeng Fan, Lujun Pan
Summary: A three-dimensional SERS substrate has been obtained by assembling Ag nanoparticles onto multilayered TiO2 nanowires, exhibiting high sensitivity and strong adsorption capability for probe molecules, as well as recyclability. The 3D network structure and nanogaps of TiO2 nanowires contribute to the performance enhancement of the substrate, making it suitable for ultrasensitive chemical and biological molecule detection.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Food Science & Technology
Lixin Ma, En Han, Limei Yin, Qian Xu, Caixia Zou, Junwen Bai, Wei Wu, Jianrong Cai
Summary: A label-free SERS sensor was developed using bimetallic core-shell Au@Ag nanoparticles to simultaneously detect acetamiprid and thiram. The SERS substrates were synthesized by a seed-mediated growth method and showed satisfactory linearity in the detection of mixed pesticides. The method demonstrated excellent recovery rates and has the potential to be used for on-site detection of multiple contaminants in food safety when combined with a portable Raman spectrometer.
Article
Materials Science, Multidisciplinary
Hongyu Chen, Hongmei Liu, Ying Chen, Xiang Li, Chenjie Gu, Tao Jiang
Summary: A hybrid substrate of zinc oxide/graphene oxide/silver with both photocatalytic capability and surface-enhanced Raman scattering (SERS) activity was developed in this study, showing promising potential for real-time and fast monitoring of biochemical hazardous molecules through successful recyclable assays with minimal limits of detection.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Jun Guo, Chunsheng Ding, Wei Gan, Peng Chen, Miao Zhang, Zhaoqi Sun
Summary: A SERS substrate based on black phosphorus quantum dots (BPQDs) and silver nanoparticles co-sensitized titanium dioxide nanorod arrays has been successfully fabricated for limit trace detection test. The substrate shows high sensitivity, good uniformity, and excellent repeatability and stability, making it a promising candidate for SERS applications. The improved SERS activity is attributed to the synergistic effect of BPQDs, silver nanoparticles, and titanium dioxide nanorod arrays.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Jieyi Cai, Zhezhe Wang, Siyi Jia, Zhuohong Feng, Yang Ren, Lin Lin, Guilin Chen, Zhiqiang Zheng
Summary: Highly ordered TiO2/Ag bilayer structures were fabricated on p-type silicon wafers using photolithography and electrochemical self-assembly methods. The interfacial charge transfer behavior of the Si/TiO2/Ag structure was studied, which is crucial for enhancing SERS performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Ilknur Korkmaz, Menekse Sakir, Gokhan Sarp, Samaa Salem, Ilker Torun, Dmitry Volodkin, Emre Yavuz, M. Serdar Onses, Erkan Yilmaz
Summary: This study presents a platform based on heterojunction membrane, utilizing photocatalysis and SERS technology for degradation and detection of organic dyes, demonstrating superior efficiency and stability.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Spectroscopy
Erwei Liu, Xia Fan, Zengling Yang, Lujia Han, Shouxue Li, Yuanping Huang, Keke Liao, Linwei Cai
Summary: In this study, a method for rapid and sensitive detection of multiple illegal additives in feed and food samples was developed using surface-enhanced Raman spectroscopy. The composite substrate used in the method showed good linearity and reproducibility, as well as enhanced detection capability and self-cleaning characteristics. The results suggest that this method has great application potential in feed and food safety.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biochemical Research Methods
Xiaoli Xin, Yi Li, Lu Yu, Weihua Li, Jiansheng Li, Rui Lu
Summary: Ag@C core-shell nanoparticles were prepared by a low-temperature heating-stirring method and subsequently modified with polyethyleneimine (PEI). Ag@C@Ag hybrid nanoparticles were then fabricated with 24-nm Ag NPs attached, demonstrating excellent optical properties for surface-enhanced Raman scattering (SERS) applications. Finite-difference time-domain simulations indicated that the signal enhancement was attributed to the Ag NPs, hot spots, and external assembly, allowing for ultrasensitive spectral analysis.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Jun Guo, Miao Zhang, Zhuangzhuang Yin, Chunsheng Ding, Peng Chen, Wei Gan, Hai Yu, Zhaoqi Sun
Summary: In this study, high-performance surface-enhanced Raman scattering (SERS) substrates and photocatalysts were successfully synthesized using TiO2 nanorod arrays co-sensitized with black phosphorus nanosheets and Ag nanoparticles. The resulting BP/Ag/TNR substrate exhibited excellent SERS sensitivity for the detection of organic pollutants, as well as self-cleaning abilities through photocatalytic degradation. The improved performance was attributed to the formation of high-density hot spots, expansion of optical capture abilities, and enhancement of charge transfer properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Graham Dawson, Xiaorong Cheng, Anthony Centeno, Yulia Pilyugina, Wentian Niu, Ruochen Liu
Summary: In this study, a novel triad nanocomposite was prepared with excellent SERS properties. By controlling the size and position of silver nanoparticles, and matching the localized surface plasmon resonance (LSPR) of the silver particles with the Raman excitation wavelength, a SERS enhancement greater than 6 orders of magnitude was achieved. Electromagnetic modeling was used to provide a theoretical basis for these results.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Yingnan Quan, Jia Li, Mingyue Hu, Maobin Wei, Jinghai Yang, Ming Gao, Yang Liu
Summary: This study reports a surface-enhanced Raman spectroscopy (SERS) biosensor, MoS2@ZnO@Ag, for ultrasensitive detection of free bilirubin in serum. The substrate combines the advantages of low cost, simple pretreatment, and high sensitivity, and can accurately and quantitatively analyze actual samples. The detection limit for bilirubin is 10-8 M.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Multidisciplinary
Xin Zhu, Jingyun Zhang, Cuihong Yang, Ying Li, Yunyun Chen
Summary: We investigate the influence of shape truncation on the plasmonic properties of a single Ag nanowire in an Au film nanocavity. The results show that truncation has a significant effect on the plasmonic properties, with a blue shift in the scattering peak position from 962 nm to 608 nm. The electric field strength and charge distribution reveal an evolution from dipole mode to quadrupole mode. Our findings contribute to the development of high-performance tunable optical nano-devices in the future.
CHINESE PHYSICS LETTERS
(2023)
Article
Materials Science, Paper & Wood
Jing Yang, Jiangtao Xu, Xueyan Bian, Yi Pu, Ka Lam Chiu, Dagang Miao, Shouxiang Jiang
Summary: This study introduces a flexible SERS substrate utilizing rGO and cotton fabric, which shows improved performance, excellent signal reproducibility, and stability. The substrate demonstrates enhanced reusability, retaining strong Raman signals even after multiple detection and washing cycles, making it a promising product for practical applications.
Article
Chemistry, Multidisciplinary
Xin Li, Florian Ion Tiberiu Petrescu, Qupei Danzeng, Haiyan Zhu, Ying Li, Gang Shi
Summary: In this research, the micropyramid structure was transferred to the TiO2 substrate by soft imprinting, and PPy nanobowls and Ag nanoparticles were successfully assembled to form a novel SERS substrate. This substrate exhibited excellent performance in detecting molecules at low concentrations, with a Raman enhancement factor of up to 3.4 x 10(5). Additionally, it demonstrated outstanding catalytic degradation performance and recyclability.
Article
Spectroscopy
Tao Xu, Rongyan Wang, Chenjie Gu, Tao Jiang
Summary: A novel composite substrate of graphitic carbon nitride/molybdenum disulfide/silver with a 3D surface structure was successfully developed for the recyclable detection of gefitinib in serum. The uniform and dense hotspots on the shrubby active surfaces, along with the potential synergistic chemical enhancement of g-C3N4/MoS2 heterosystem, demonstrated a remarkable SERS sensitivity. The type-II heterojunction between g-C3N4 and MoS2, assisted by the localized surface plasmon resonance of Ag NPs, enabled more efficient diffusion of photogenerated e--h+ pairs and contributed to the reliable recyclable detection of gefitinib with ultra-low detection limit and high recycling rates.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Optics
Liu Lu, Chenyang Wang, Looh Augustine Ngiejungbwen, Liang Zhang, Tiantian Zhao, Daifen Chen, Xifeng Ren
Summary: A new plasmonic nanofocusing metalens based on aperiodic silica grating arrays has been designed and investigated. By utilizing graphene surface plasmon, the infrared polarized light can be focused in a nanospot with a dynamically controlled focal length. The study also analyzes the variation of focusing efficiency with incident wavelength and Fermi level.
Article
Optics
Yao Zhao, Yang Chen, Zhi-Shan Hou, Bing Han, Hua Fan, Lin-Han Lin, Xi-Feng Ren, Hong-Bo Sun
Summary: This study investigates the propagation of polarization-dependent Bloch oscillations and demonstrates the polarization-dependent Bloch period using a polymer-based gradient waveguide array. The results provide a new paradigm for two-dimensional optical Bloch modes and highlight the influence of optical polarization in the same system, enabling the observation of richer physics related to Bloch oscillations.
Article
Chemistry, Multidisciplinary
Rui Wang, Zhen He, Jin-Long Wang, Jia-Yang Liu, Jian-Wei Liu, Shu-Hong Yu
Summary: This study presents a simple and effective method to create multi-layered structures in nanowire films, resulting in a photothermoelectric photodetector with broad-band responsivity, fast response speed, stability, and polarization sensitivity.
Article
Chemistry, Multidisciplinary
Cheng Chen, Bin Zhao, Rui Wang, Zhen He, Jin-Long Wang, Mingke Hu, Xin-Lin Li, Gang Pei, Jian-Wei Liu, Shu-Hong Yu
Summary: Solar thermoelectric devices, with their unique ability to convert waste heat and solar energy into electricity, play a significant role in addressing the problem of global warming. In this study, a flexible 3D Janus helical ribbon architecture was designed, which showed all-day electricity generation, large temperature gradient, and even generated electricity at night. This strategy offers a new way for heat management by efficiently utilizing solar energy and the cold of the universe.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bing Qin, Zhi-Long Yu, Jin Huang, Yu-Feng Meng, Rui Chen, Zhi Chen, Shu-Hong Yu
Summary: In this study, a petrochemical-free strategy was developed to fabricate superelastic cellulose aerogels with hierarchical structures at multi scales. The aerogels showed temperature-invariant elasticity, fatigue resistance, and high angular recovery speed, outperforming most cellulose-based aerogels. This benign strategy retained the biosafety of biomass and provided an alternative filter material for health-related applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Applied
Aiping Liu, Wei Peng, Zirui Li, Xingping Zhou, Xi-Feng Ren, Chang-Ling Zou, Qin Wang
Summary: An integrated photonic device that converts on-chip waveguide modes to free-space optical angular momentum beams is proposed. The device consists of a polarization splitter rotator and a waveguide surface holographic grating. The output orbital angular momentum state can be controlled by the input polarization state. Numerical results show a conversion efficiency of above 14% (18%) for the transverse-magnetic (transverse-electric) mode to the optical angular momentum mode with l = - 1 (+ 1), with a fidelity up to 0.84 and a working bandwidth of approximately 40 nm for a fidelity above 0.8. The proposed device provides a feasible information channel between integrated optics and free space.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Si-Zhe Sheng, Shi-Qiao Zheng, Xue-Fei Feng, Ling-Ran Zhou, Zhen-Chao Tao, Jian-Wei Liu
Summary: This study provides a new strategy for assembling ordered structures of gold nanoparticles using highly ordered nanowire templates to explore the ordering effect on SERS performance. The highly ordered gold nanoparticle arrays show improved detection limit and enhancement factor compared to disordered gold particles.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Lan-Tian Feng, Ming Zhang, Di Liu, Yu-Jie Cheng, Guo-Ping Guo, Dao-Xin Dai, Guang-Can Guo, Mario Krenn, Xi-Feng Ren
Summary: In this study, the authors experimentally demonstrate the quantum coherent superposition of a four-photon state with two different origins. The emergence of multi-photon frustrated interference is due to the quantum indistinguishability by path identity. The quantum state is created on a silicon photonic chip using four probabilistic photon-pair sources, and the distributed four photons can be fully controlled by tuning phases.
Article
Optics
Li-cheng Wang, Yang Chen, Zhen-nan Tian, Ying-de Wang, Xi-feng Ren, Qi-dai Chen
Summary: This letter investigates the influence of next-nearest-neighbor interactions on the topological properties of the SSH model. The experimental observations of delocalization transition of light in SSH lattices with nontrivial phase are in good agreement with theoretical predictions.
Article
Multidisciplinary Sciences
Si-Zhe Sheng, Jin-Long Wang, Bin Zhao, Zhen He, Xue-Fei Feng, Qi-Guo Shang, Cheng Chen, Gang Pei, Jun Zhou, Jian-Wei Liu, Shu-Hong Yu
Summary: This article proposes a co-assembly strategy to produce smart windows with electrochromic and thermochromic functions, tunable components, and ordered structures for dynamic solar radiation regulation. Smart windows with adjustable optical properties are attractive for efficient heat management and improved indoor comfort.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Yunkun Wu, Yutao Tang, Zixian Hu, Lantian Feng, Guangcan Guo, Xifeng Ren, Guixin Li
Summary: Optical spin-orbit interaction (SOI), which simultaneously controls the spin and orbital angular momentum of light, is important for classical and quantum information applications. While SOI of light has been extensively studied in linear and nonlinear optics, it has not been explored in quantum nonlinear optical processes such as spontaneous parametric downconversion (SPDC). This study demonstrates that optical SOI in the SPDC process can be achieved through a nonlinear crystal with threefold rotational symmetry, enabling the generation and control of two-photon quantum states with controlled angular momentum.
Article
Optics
Lan-Tian Feng, Yu-Jie Cheng, Xiao-Zhuo Qi, Zhi-Yuan Zhou, Ming Zhang, Dao-Xin Dai, Guang-Can Guo, Xi-Feng Ren
Summary: This study investigates the spontaneous four-wave mixing effect in cryogenically-operated silicon waveguides and demonstrates its effectiveness in generating quantum photonic sources. The generated cryogenic photon-pair source is verified over multiple frequency channels within a bandwidth of approximately 2 THz and is utilized to generate high-quality frequency-multiplexed energy-time entangled states. This work advances the development of cryogenic nonlinear photonics and scalable integrated photonics for quantum information processing.
Article
Optics
Shang-Yu Ren, Wei-Qiang Wang, Yu-Jie Cheng, Long Huang, Bing-Zheng Du, Wei Zhao, Guang-Can Guo, Lan-Tian Feng, Wen-Fu Zhang, Xi-Feng Ren
Summary: Dense quantum entanglement distribution is essential for practical quantum communication, quantum networks, and distributed quantum computation. In this study, we integrated a dense wavelength-division demultiplexing system and unbalanced Mach-Zehnder interferometers on a large-scale photonic chip to achieve multi-channel wavelength multiplexing entanglement distribution among distributed photonic chips. Our work demonstrates the feasibility and effectiveness of this integrated system and provides a path for practical applications of entanglement-based quantum key distribution and quantum networks.
Article
Chemistry, Multidisciplinary
Ning-Ning Huang, Jie Gao, Si-Zhe Sheng, Qi-Guo Shang, Zhi-Yu Xian, Jin-Long Wang, Jian-Wei Liu
Summary: Structural color is attracting increasing attention in display applications due to its reversible switch between reflection and transmission states when viewed from different angles. However, the lack of autonomous regulation limits its practicality in different scenarios. This study presents an intelligent two-way structural color film that can change its color reversibly when applied with additional stimuli such as voltage, heat, or light. The film's special structural feature, a traditional photonic crystal film of polystyrene (PS) microspheres assembled by smart windows, exhibits remarkable polarization sensitivity and broadens the gamut of display color. This hierarchically designed film holds promise for next-generation multicolor displays and smart windows.
