Article
Chemistry, Multidisciplinary
Yan Ke, Bin Chen, Mengen Hu, Ningning Zhou, Zhulin Huang, Guowen Meng
Summary: This study demonstrates the controlled plasmon-mediated oxidation of para-aminothiophenol (p-ATP) using Au@Ag core-shell nanostars with tunable tip plasmons as reactors. The results show that plasmon bands of metal nanostructures play an important role in the efficiency of plasmon-driven photocatalysis.
Article
Chemistry, Physical
Anushree Dutta, Robin Schuermann, Sergio Jr Jr Kogikoski, Niclas S. Mueller, Stephanie Reich, Ilko Bald
Summary: Plasmon-driven photocatalysis using noble metal nanoparticles shows promising potential in heterogeneous systems. The study on dehalogenation kinetics of brominated purine derivatives on aggregated surfaces of silver and gold nanoparticles reveals the importance of hot electrons concentration and dissociation time scale of transient negative ions in defining the reaction rate law. The findings suggest that efficient hole deactivation and wavelength dependency play key roles in the overall reaction rate, which could have implications for applications such as plasmon-assisted cancer therapy.
Article
Chemistry, Analytical
Anni Zhu, Tiansheng Wang, Yuning Jiang, Sen Hu, Wanxin Tang, Xinling Liu, Xiaoyu Guo, Ye Ying, Yiping Wu, Ying Wen, Haifeng Yang
Summary: A novel SERS assay for dopamine detection based on azo derivatization reaction exhibits superior sensitivity, selectivity, and stability, free from interference in complex physiological fluid, with potential application in early disease diagnosis.
Article
Optics
Sara D. G. Mariano, Naythalla A. M. Saraiva, Jean C. S. Costa, Claudevan A. Sousa, Nefe J. B. Silva, Hans A. Garcia, Francisco Eroni P. Santos
Summary: This study investigates the nonlinear optical properties of metallic nanoparticles, focusing on monometallic silver and bimetallic silver-gold nanoparticles, in the infrared region with ultra-short pulses. The nanoparticles exhibited localized surface plasmon resonance characteristics and good size distribution. The results suggest great potential for application in photonics, especially in tuning nonlinear optical properties.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Applied
Jiale Zhang, Caijun Wu, Ruo Yuan, Jian-An Huang, Xia Yang
Summary: This study reports a subtle surface-enhanced Raman scattering (SERS) substrate for detecting the dithiocarbamate fungicide Thiram. By controlling the inter-particle spacing of gold-silver-gold nanoparticles, a remarkable enhancement of Raman signal and stability was achieved. This method holds potential for rapid assessment and identification of pesticides on foods.
Article
Chemistry, Multidisciplinary
Antonio Carone, Pablo Mariani, Anthony Desert, Marco Romanelli, Jacopo Marcheselli, Marco Garavelli, Stefano Corni, Ivan Rivalta, Stephane Parola
Summary: Chiral plasmonic nanomaterials have promising applications. This study expands the range of available chiral plasmonic nanostructures and proposes the importance of the outer part of the nanoparticles shell on plasmonic circular dichroism.
Correction
Chemistry, Physical
Xuan-Hung Pham, Eunil Hahm, Tae Han Kim, Hyung-Mo Kim, Sang Hun Lee, SangChul Lee, Homan Kang, Ho-Young Lee, Dae Hong Jeong, Hak Soo Choi, Bong-Hyun Jun
Summary: The author name and corresponding affiliation in the original version of this article were mistakenly labeled.
Article
Nanoscience & Nanotechnology
Yimin Fan, Tao Zhang, Zubo Cai, Dongxian Li, Weisheng Yue, Tiancheng Gong, Yunfei Luo, Ping Gao
Summary: Arrays of gold-silver bimetallic nanopillars were fabricated using surface-plasmon lithography and their enhancement properties as surface-enhanced Raman scattering substrates were studied. The nanopillars showed a good response in the detection of methylene blue molecules at a low concentration. The Au-Ag bimetallic coating exhibited higher SERS enhancement compared to pure Au or Ag coatings. This study demonstrates the potential of the fabricated SERS substrates for detecting biochemical molecules at trace levels, and surface-plasmon lithography as a promising method for fabricating SERS substrates.
Article
Nanoscience & Nanotechnology
Xingxing Yu, Yan Sun, Jieyu Hu, Junjie Wang, Xiumei Zhuang, Shenghao Zhang, Haiting Ren, Hongxing Qiu, Yueshou Zhang, Yongjun Hu
Summary: A three-dimensional MoS2/Au/Ag nanostructure was developed for rapid and sensitive detection of pesticide residues using Surface-enhanced Raman scattering (SERS). The nanostructures combine the advantages of high-enhancement SERS substrates and high-accuracy ratiometric Raman detection. They showed excellent SERS activity in ratiometric analysis and successfully detected thiabendazole (TBZ) in apple juice with a limit of detection down to 0.1 ppm.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tingzhen Yan, Ruijin Hong, Jiqing Lian, Chunxian Tao, Hui Lin, Qi Wang, Zhaoxia Han, Dawei Zhang
Summary: The nonlinear optical response of indium tin oxide films covered with Au@Ag colloid layer was investigated using a femtosecond single-beam open aperture Z-scan technique. The transition from saturated absorption to reverse saturated absorption was observed as the thickness of Au@Ag increased. The nonlinear absorption coefficient of these composite materials can be adjusted from -6.85 x 10(-7) m/W to 26.06 x 10(-7) m/W. Additionally, the structure, morphology, and other optical properties of the specimen were characterized, and the finite-difference time-domain results were in agreement with the experimental results. The NLO response of the ITO/Au@Ag composites can be attributed to phase properties, synergistic competition effect, epsilon-near-zero mode, and localized surface plasmon resonance between indium tin oxide films and Au@Ag.
Article
Chemistry, Multidisciplinary
Fuqi Yao, Jiamiao Wang, Wei Zhang, Zhetao Wang, Yunfeng Li, Hao Sun, Qiang Chen, Pei Liang
Summary: Noble metal nanoparticles are durable due to their unique Localized Surface Plasmon Resonance (LSPR) properties, making them suitable for medical testing and biosensing. This study presents a microfluidic platform for controlled synthesis of uniform Au@Ag nanocubes in 15 minutes. The synthesized nanocubes show satisfactory results in detecting Raman probe methylene blue and antibiotic sulfadiazine using surface-enhanced Raman scattering (SERS).
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Weiyan Liu, Jianwen Zhang, Juan Hou, Haibibu Aziguli, Qiming Zhang, Hu Jiang
Summary: In this paper, Au-Ag alloy hollow nanochains (HNCs) were successfully prepared by a template-free self-assembly method achieved by partial substitution of ligands. The obtained Au-Ag alloy HNCs show stronger surface-enhanced Raman scattering (SERS) effect than Au-Ag alloy hollow nanoparticles (HNPs) and Au nanochains substrates, due to the synergistic effect between the plasmon hybridization effect associated with the unique alloy hollow structure and the strong hot spot in the interstitial regions of the nanochains.
Article
Biochemical Research Methods
Charles Soon Hong Hwang, Myeong-Su Ahn, Ki-Hun Jeong
Summary: Silver-gold alloy nanohole arrays demonstrate enhanced refractive index sensitivity and long-term stability for ultra-sensitive plasmonic label-free detection of Escherichia coli, providing a new outlook for widely applicable biosensing and bio-medical applications.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Chemistry, Physical
Zewen Zuo, Lianye Sun, Yongbin Guo, Lujun Zhang, Junhu Li, Kuanguo Li, Guanglei Cui
Summary: This work demonstrates multiple plasmon couplings in three-dimensional hybrid plasmonic systems, generating intense and high-density electromagnetic hot spots for enhanced sensitivity and reproducibility in surface enhanced Raman scattering (SERS) detection.
Article
Nanoscience & Nanotechnology
Diptiranjan Paital, Varsha Thambi, Mahesh S. Kutwal, Saumyakanti Khatua
Summary: Plasmonic porous Au-Ag nanoparticles show significantly improved catalytic activity in electrochemical and photoelectrochemical methanol oxidation reaction (MOR). The presence of nanopores suppresses poisoning from intermediate species, leading to improved stability. Additionally, the porous nanoparticles exhibit enhanced catalytic activity under visible and near-infrared excitations.
ACS APPLIED NANO MATERIALS
(2022)