Article
Biophysics
Qiuyan Chen, Liyan Zhao, Hong Liu, Qianqian Ding, Chenghao Jia, Sihao Liao, Ningtao Cheng, Min Yue, Shikuan Yang
Summary: In this study, nanoporous Ag nanorods were prepared through chemical reduction of electrodeposited Ag7O8NO3 nanorods using a reducing agent. The nanopores in the Ag nanorods can function as both analyte containers and SERS hot spots, providing strong SERS enhancement. The simple fabrication process and outstanding SERS performance make the nanoporous Ag nanorods promising candidates for sensitive detection of various pollutants, narcotics, and biomolecules.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Chengpeng Zhang, Shuai Chen, Zhaoliang Jiang, Zhenyu Shi, Jilai Wang, Lutao Du
Summary: A highly sensitive and stable 3D SERS substrate based on ordered micropyramid array and silver nanoparticles was constructed, showing a low detection limit and high repeatability. The substrate also demonstrated the ability to quantitatively analyze pesticide residues.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Heng Wang, Guo-Min Li, Bing Li, Jing-Lin You
Summary: In this study, aluminum nanowires with irregular morphologies were prepared by template-free electrodeposition. The effects of diffusion condition and deposition potential on the morphologies were examined. The decrease of diffusion flux resulted in segmented morphologies, while a dynamic equilibrium between electrochemical reaction and Al2Cl7- diffusion caused current fluctuation and periodic variation of diameters. Controllable electrodeposition of various morphologies was achieved under restricted diffusion condition and increased overpotential. Most segmented nanowires exhibited single crystalline structure and grew in [100] orientation.
Article
Chemistry, Analytical
Chuang Liu, Jing Wu, Su Wang, Jinghuai Fang
Summary: This paper proposes an efficient, stable and cost-effective directional electrodeposition method for constructing large-scale uniform metal nanoarrays, which can be used as reliable SERS substrates. With the assistance of uniform porous anodized aluminum oxide templates, a series of homogeneous gold nano-rampart arrays (AuNRAs) were successfully prepared controllably using directional electrodeposition growth technology, demonstrating excellent SERS stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Shengyuan Yao, Yan Lv, Qing Wang, Jinhui Yang, Hongmei Li, Ningning Gao, Furu Zhong, Jihong Fu, Jun Tang, Tao Wang, Dianzeng Jia
Summary: As a new 2D carbon allotrope, graphdiyne (GDY) with its unique electronic space arrangement structure has the characteristics of uniform pores and large specific surface area. A novel gold nanoparticles (Au NPs)/GDY/carbon cloth (CC) SERS substrate was fabricated using GDY nanowall as support. The substrate showed good sensitivity in detecting organic dyes.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Changding Wang, Xiaohui Xu, Guoyu Qiu, Weichun Ye, Yumin Li, Richard A. Harris, Chaoyang Jiang
Summary: This study developed Ag nanosheets/ZnO nanoparticles hybrids with specific metal facets and additional charge transfer effect, established a calibration curve for estazolam, and achieved group-targeting screening of total concentrations of five BZDs.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Yu-Fang Huang, Wen-Chi Huang, Pei-Kai Hsu, Jenn-Ming Song, Alexandre Gloter, Shih-Yun Chen
Summary: This study successfully synthesized magnetically-manipulatable and reusable SERS active buoyant substrates, Ag@SiO2@Fe3O4 composite hollow spheres, which consist of Fe3O4 inner shell, SiO2 outer shell, and Ag nanoparticles on the surface. The hollow structure exhibited stronger SERS signal intensity compared to solid cores, can be easily concentrated and separated under external magnetic field, resulting in a more augmented SERS effect. These ferromagnetic hollow composites also demonstrated the possibility of reusing for SERS measurements.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Wenbin Li, Xuehua Lu, Rongxiao Yang, Fei Liang, Weidong Chen, Zhengwei Xie, Jie Zheng, Jianqi Zhu, Yijia Huang, Weisheng Yue, Ling Li, Yarong Su
Summary: This study presents a novel metal/insulator/metal (MIM) structure combined with polystyrene (PS) binary colloidal crystals (bCCs) for surface-enhanced Raman scattering (SERS) substrates. The substrate, fabricated by self-assembly and evaporation technologies, shows high enhancement factor and ultralow detection limit, suitable for bio- and chemical molecular analysis.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Abeer Fahes, Aotmane En Naciri, Mohammad Navvabpour, Safi Jradi, Suzanna Akil
Summary: This study presents a novel approach to fabricate ultrasensitive SERS sensors based on silver/PMMA nanocomposites, achieving large-scale, reproducible SERS platforms through a rapid, simple, low-cost method. The platform showed high SERS enhancement factors and reproducible SERS features, without the need for reducing agents, copolymers, or surface functionalization. The synthesis method was successfully applied to prepare opaque SERS platforms, which are essential for photonic devices due to the absence of secondary back reflection.
Article
Engineering, Chemical
Tahir Muhmood, Zihe Cai, Shengxuan Lin, Jiajia Xiao, Xiaobin Hu
Summary: This study presents a single-step polyol-solvothermal synthesis strategy for the synthesis of zero, one, two, and three-dimension silver structures by simply switching the reaction pressure with the help of silver amount and halide ions. This strategy eliminates the need for oxygen scavengers, inert gases, or adjustments to injection and stirring speeds.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Tristan C. Paul, Guy M. Hagen, Anatoliy O. Pinchuk, Kelly L. McNear
Summary: Creating sensitive and reproducible SERS substrates is a challenge. This study found that using a 405 nm laser to deposit lines of silver nanoparticles from a silver nitrate and sodium citrate solution yielded the best enhancement and consistency.
Article
Materials Science, Multidisciplinary
Haibao Zhang, Guang Li, Xian Zhang, Xingyou Tian
Summary: The SERS substrate was synthesized using a two-step electrodeposition method based on ZNNs template, resulting in a high sensitivity and activity Au nanoparticles composite membrane.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Ghazanfar Ali Khan, O. Ozge Demirtas, Ahmet Kemal Demir, O. Ozlem Aytekin, Alpan Bek, Arshad Saleem Bhatti, Waqqar Ahmed
Summary: The fabrication of interconnected Ag nanostructures on unmodified filter paper-based flexible substrates via a simple method has attracted attention for trace detection. These substrates offer high efficiency, reproducibility, and potential for scalability. They provide uniformly distributed hotspots, excellent SERS sensitivity, and have shown effectiveness for detecting various analytes, making them ideal for on-site quantitative detection and sensing applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Spectroscopy
Vitor Brasiliense, Ji Eun Park, Zhu Chen, Richard P. Van Duyne, George C. Schatz
Summary: The method described in the text fabricates localized EC-SERS probes based on nanopipettes and electrodeposition efficiently and cost-effectively. It produces gold particles with fractal geometry, allowing for tailored SERS platforms of different sizes to match experimental configurations. By analyzing numerous samples, guidelines for fabricating optimized platforms are provided, showing the ability to modulate surface-analyte affinity and use chemically unstable materials like Cu reliably.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Carlos Puente, Nayely Pineda Aguilar, Idalia Gomez, Israel Lopez
Summary: Surface-enhanced Raman spectroscopy (SERS) substrates have attracted great interest due to the need for substrates with high sensitivity and low fabrication costs. In this study, Ag nanoparticles were photoconverted using a simple and affordable red-green-blue light-emitting diode photoreactor. The dispersions obtained were transformed into a paste of nanoparticles and used to fabricate SERS substrates through a simple drop-casting process. The performance of these substrates was tested and showed a significant enhancement in Raman intensities and substrate sensitivity with an increase in the number of faces and vertices in the particle.
