Article
Chemistry, Analytical
Meng-Qi He, Yongjian Ai, Wanting Hu, Xiaomeng Jia, Lei Wu, Mingyu Ding, Qionglin Liang
Summary: By using DNA as an etching agent, it is possible to control the morphology and optical properties of plasmonic nanoparticles, while also introducing fluorescence properties. This strategy allows for precise tuning of localized surface plasmon resonance (LSPR) and fluorescence-composited dual-mode signals.
ANALYTICAL CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Qi Zhang, Tian-Song Deng, Yun-Qi Dou, Ming-Zhang Wei, Shiqi Li, Jia Liu, Zhiqun Cheng
Summary: A trimetallic nanostructure was designed and used as a plasmon-mediated photocatalyst. By optimizing the composition of the shell, nanoparticles with excellent catalytic performance were obtained.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Da Li, Julien Brunie, Fan Sun, Philippe Nizard, Delphine Onidas, Aazdine Lamouri, Vincent Noel, Claire Mangeney, Giorgio Mattana, Yun Luo
Summary: A new generation of SERS security labels based on silver nanoparticles functionalized by aryl diazonium salts with distinguishable Raman fingerprints was developed in this study. The remarkable potential of diazonium salt chemistry to design Ag NPs-based SERS security labels was confirmed through proof-of-concept Raman imaging experiments and their successful application in ink printing.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Richard Robinson, Virginia Krause, Shan Wang, Shan Yan, Guojun Shang, Justine Gordon, Serena Tycko, Chuan-Jian Zhong
Summary: There is an increasing need to reduce the silver content in silver-based inks or pastes and achieve low-temperature sintering for scalable and low-cost production of printed wearable electronics. This study reports a scalable wet chemical synthesis method for the preparation of bimetallic silver-copper alloy nanoinks with room temperature sintering properties. It is found that the nanoinks can sinter on paper substrates at room temperature.
Article
Thermodynamics
Smita Mahadevappa Nyamgoudar, Vasavi Prasuna Silaparasetti, M. P. Shilpa, K. S. Pavithra, Shridhar Mundinamani, K. M. Eshwarappa, Srivathsava Surabhi, Koduri Ramam, Ravikirana, A. Ganesha, S. C. Gurumurthy
Summary: Nanofluids are a type of fluid prepared by dispersing nanoparticles in conventional base fluids, which have excellent thermo-physical properties and potential applications in manufacturing industries. In this study, silver nanoparticles and nanorods were prepared using a simple chemical reduction method, and their effect on the thermal conductivity of the base fluids was investigated. The results showed that nanofluids containing 2% of silver nanoparticles and nanorods exhibited the optimal heat conductivity.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Yunshan Fan, Yara Aceta, Esther Hessong, Athena Bengston, Laris A. Biageyian, Quan P. Huynh, Robert M. Corn
Summary: Diffraction patterns observed in SPRI microscopy measurements of single gold nanorods exhibit complex behavior near the longitudinal plasmonic resonance band, with a unitless ratio parameter M-R created to describe the diffraction pattern distribution. Results show that this behavior only occurs in the anomalous dispersion region, when the laser wavelength used is shorter than the AuNR plasmonic resonance maxima.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Lin Li, Fenglian Qi, Jiong Guo, Jing Fan, Wenxiang Zheng, Murtaza Ghulam, Weizhi Wang, Zihui Meng, Lili Qiu
Summary: In this study, Fe2O3@Au hexagonal nanodisks with tunable near-infrared (NIR) absorptions were successfully prepared. The localized surface plasmon resonance (LSPR) peaks of Au nanodisks were accurately tuned in the NIR therapeutic window. The Fe2O3@Au nanodisks showed low cytotoxicity and high photothermal therapy (PTT) performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Abdul Rahim Ferhan, Youngkyu Hwang, Mohammed Shahrudin Bin Ibrahim, Shikhar Anand, Ahram Kim, Joshua A. Jackman, Nam-Joon Cho
Summary: This study presents the development of plasmonic gold nanorod arrays with ultrahigh surface sensitivity for detecting biomacromolecular interactions, demonstrating superior biosensing performance. By rationally tuning nanorod dimensions, the highest reported degree of surface sensitivity compared to various plasmonic nanostructures was achieved. The measurement capabilities developed in this study have broad applicability to a wide range of biosensing applications.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Multidisciplinary
Yuhan Kong, Gongguo Zhang, Chunyu Wang, Yanyun Ma, Yiqun Zheng
Summary: In this study, Au-Ag Janus nanoparticles (JNPs) with tunable sizes were successfully synthesized, exhibiting multiple plasmonic absorptions. Doping the surface of Au seeds with Pt/Ag atoms introduced lattice strain, crucial for facilitating the anisotropic deposition of Ag. The resulting Au-Ag Janus nanoparticles exhibited more plasmonic absorption peaks compared to core-shell counterparts, showing enhanced catalytic properties.
Article
Nanoscience & Nanotechnology
Lan Peng, Ye Liu, Jing Zhang, Zhe Zhang, Zhihe Liu, Xiaofeng Fang, Yingjie Wang, Changfeng Wu
Summary: This study describes a surface plasmon-enhanced NIR-II fluorescence strategy, incorporating silica-coated gold nanorods and polymer dots into a multilayer nanostructure, achieving fluorescence enhancement in the NIR-II imaging window. This approach demonstrates superior signal-to-background ratio and penetration depth in mouse brain imaging.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Malgorzata Skwierczynska, Przemyslaw Wozny, Marcin Runowski, Piotr Kulpinski, Stefan Lis
Summary: Cellulose has the potential to be a promising material for surface-enhanced Raman scattering (SERS) substrates due to its wide availability, low cost, ease of fabrication, high flexibility, and low optical activity. This study demonstrates the development of a cellulose-based substrate that owes its SERS activity to the presence of gold nanorods in its internal structure, ensuring superior stability and reproducibility. The substrate exhibits plasmonic activity and provides easy and reproducible detection of different analytes via the SERS technique.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Mehedi H. Rizvi, Ruosong Wang, Jonas Schubert, William D. Crumpler, Christian Rossner, Amy L. Oldenburg, Andreas Fery, Joseph B. Tracy
Summary: This work investigates the properties and alignment effects of controllable gold nanorods in magnetic fields. Cationic polyethyleneimine-functionalized superparamagnetic nanoparticles are deposited on the surface of gold nanorods, and the magnetic alignment of nanorods is achieved by magnetic dipolar interactions. The experimental results demonstrate the potential for rotational manipulation of these nanorods in rotating magnetic fields. This research has important implications for further developments in nanophotonics applications.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Briliant Adhi Prabowo, Agnes Purwidyantri, Bei Liu, Hsin-Chih Lai, Kou-Chen Liu
Summary: The study investigated the impact of different gold nanoparticle structures on plasmonic enhancement for DNA detection on a few-layer graphene surface plasmon resonance sensor. The use of gold nano-urchins significantly reinforced the overall DNA hybridization signal, reaching the femtomolar range limit of detection. The integrated approach of the graphene-based SPR sensor and GNu-assisted DNA detection provided a proof-of-concept for tuberculosis disease screening in low-resource settings.
Article
Engineering, Electrical & Electronic
Hemant Ramakant Hegde, Santhosh Chidangil, Rajeev K. Sinha
Summary: This study presents the synthesis and surface immobilization of Au nanostars, Au nanocubes, and Au nanorods for refractometric sensing applications. The results demonstrate that Au nanostars with LSPR peak at 767nm exhibit the highest RI sensitivity among the tested nanostructures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Jian-Ping Sun, Ya-Tao Ren, Kai Wei, Ming-Jian He, Bao-Hai Gao, Hong Qi
Summary: Photoacoustic imaging benefits from the use of gold nanorods as contrast agents. The size change of gold nanorods affects their absorption, heat transfer, and photoacoustic characteristics. Increasing the specific surface area enhances thermal coupling and improves heat transfer, while absorption characteristics determine the photothermal and photoacoustic responses. Therefore, improving absorption characteristics is more important than increasing specific surface area, and increasing specific surface area can enhance the photostability of gold nanorods.
RESULTS IN PHYSICS
(2022)
