Article
Quantum Science & Technology
Yinhui Kan, Sergey I. Bozhevolnyi, Shailesh Kumar
Summary: Nanoantennas and nanocavities are widely used for quantum emission manipulation, and this study explores the use of silver nanocube dimers on silver substrates to achieve large Purcell enhancement. The relationship between the size and separation gap of the nanocube dimers and the resulting enhancement is investigated, with a maximum enhancement of 6.4 x 106 observed. The experimental realization of large Purcell enhancements is demonstrated using atomic force microscopy and prefabricated dielectric brick dimers, providing a promising method for designing and realizing single photon sources.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Chemistry, Applied
Ze Yu, Yufeng Mao, Anqi Lv, Zhongfu An, Huili Ma
Summary: Organic fluorophores are crucial for organic optoelectronic and bioelectronic applications. The enhancement of fluorescence in bromo-organic aggregates, which breaks the traditional belief of heavy-atom effect leading to fluorescence quenching, is achieved by the limited acceleration of intersystem crossing process and the large reduction of vibronic coupling of singlet excitons caused by bromine atoms. The excited-state dynamics further demonstrate that bromine substituents decelerate the internal conversion process and result in slow ISC rates, leading to abnormal fluorescence enhancement.
Article
Chemistry, Multidisciplinary
Krishan Kumar, Jonas Hiller, Markus Bender, Saeed Nosrati, Quan Liu, Marc Edelmann, Steffen Maier, Tim Rammler, Frank Wackenhut, Alfred J. Meixner, Kai Braun, Uwe H. F. Bunz, Marcus Scheele
Summary: By assembling CdSe nanocrystals and aggregates of an arylenethynylene derivative into a hybrid thin film, researchers observed dual fluorescence from both fluorophores with periodic anticorrelated fluorescence intensity variations at low temperature. This phenomenon is attributed to the structure-dependent aggregation-induced emission of the arylenethynylene derivative, impacting the rate of excitation energy transfer between the molecules and nanocrystals. This study emphasizes the potential of combining semiconductor nanocrystals with molecular aggregates displaying aggregation-induced emission to generate novel optical properties.
Article
Chemistry, Physical
Oznur Yildirim, Dogukan Tunay, Bestami Ozkaya, Ahmet Demir
Summary: This study investigated the effect of green synthesized silver oxide nanoparticles on bio-hydrogen yield and found that the addition of 400 mg/L nanoparticles increased the production of dark fermentative bio-hydrogen by 17%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Geza Szanto, Attila Bonyar, Istvan Csarnovics
Summary: Gold-silver and silver-gold core-shell nanoparticle dimers were studied for their extinction cross-section spectrum and bulk refractive index sensitivity. The simulations showed different spectra and sensitivities for particles with varying sizes and distances. Peaks in the extinction spectra could be assigned to either gold or silver components, with the most intense peak representing one of them. Moving the boundary line between the two regions depended on the interparticle gap for Ag@Au dimers and the core size for Au@Ag dimers. The presented data could be used to optimize interparticle gaps and maximize the sensitivity of nanoparticle dimers.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2022)
Article
Polymer Science
Jie Zhang, Jing Wang, Guixiu Fan, Bingjie Zhang, Guanglong Ma, Haiyan Xiao, Longgang Wang
Summary: In this study, daptomycin-biomineralized silver nanoparticles (Dap-AgNPs) with good stability and high photothermal conversion efficiency were successfully prepared. Furthermore, they exhibited good biocompatibility and significant anti-tumor ability under irradiation.
Article
Chemistry, Analytical
Aimei Hong, Qing Tang, Ashfeen Ubaid Khan, Maozhong Miao, Zhenlan Xu, Fei Dang, Qian Liu, Yawei Wang, Daohui Lin, Juliane Filser, Lingxiangyu Li
Summary: A new method for the identification and speciation of nanoscale silver in soils and sediments has been developed, using a sequential extraction technique coupled with inductively coupled plasma optical emission spectrometry. Optimal extraction conditions were determined and the method was validated for its effectiveness in analyzing the distribution of different forms of silver nanoparticles in complex matrices.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Xihui Jiang, Qian Zhu, Haoyu Zhu, Zhiqiang Zhu, Xiangyang Miao
Summary: A new electrochemical method for sensitive and reliable detection of nucleic acids in complex biological fluids was developed by coupling lipid membrane and silver nanoparticles. The method utilizes target-induced Y-shaped structure formation and solid-state Ag/AgCl response of AgNPs to achieve high sensitivity in nucleic acid detection, especially in clinical diagnosis.
ANALYTICA CHIMICA ACTA
(2021)
Article
Polymer Science
Ratchanon Jenkhongkarn, Muenduen Phisalaphong
Summary: Composite films of bacterial cellulose-silver nanoparticles (BC-Ag) were prepared using different methods of in situ reduction, and their properties were investigated. The use of different reduction methods resulted in variations in the size, crystallinity, mechanical properties, thermal stability, electrical conductivity, and water absorption capacity of the composites. However, all BC-Ag composites exhibited strong antibacterial activities.
Article
Environmental Sciences
Senthil Kumar Srinivasan, Rajan Kuppusamy, Purushothaman Krishnan
Summary: The research investigates the combustion, performance, and emission characteristics of a CI engine using neat biodiesel mixed with alumina and titanium oxide nanoparticles. The addition of nanoparticles resulted in increased brake thermal efficiency, reduced brake-specific fuel consumption, and decreased CO, HC, and smoke emissions, while NOx emissions increased compared to neat biodiesel.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Sriram Rathnakumar, Seemesh Bhaskar, Aayush Rai, Darisi V. V. Saikumar, Naga Sai Visweswar Kambhampati, Venketesh Sivaramakrishnan, Sai Sathish Ramamurthy
Summary: The study focuses on the use of biocompatible nanotechnology for substrate nanoengineering to develop silver nanoparticles for nanophotonic applications. By studying the nanointerfaces in the SPCE platform, tunable plasmonic coupling was achieved resulting in over 900-fold SPCE enhancements for mobile phone-based attomolar sensing. The simple, realistic, and eco-friendly methodology adopted here opens the door for exploring next-generation bio-inspired nanomaterials for point-of-care diagnostic applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Meng Wang, Lingna Zheng, Bing Wang, Pu Yang, Hao Fang, Shanshan Liang, Wei Chen, Weiyue Feng
Summary: This study demonstrates the use of laser ablation-single particle inductively coupled plasma mass spectrometry (LA-sp-ICP-MS) for high-resolution, sensitive, and accurate imaging of the in situ distribution of particulate Ag and released ionic Ag in the sub-organs of mice after intravenous injection of Ag nanoparticles. The imaging results provide visual evidence of the accumulation and distribution of particulate Ag in the spleen and liver parenchyma, as well as the release and distribution of ionic Ag in the organs. The developed LA-sp-ICP-MS method is a powerful tool for studying the in vivo degradation behavior of metallic nanoparticles.
CHINESE CHEMICAL LETTERS
(2022)
Article
Physics, Fluids & Plasmas
T. Vimal, G. H. Pujar, K. Agrahari, Sanjeev R. Inamdar, R. Manohar
Summary: The study focuses on the energy transfer using silver nanoparticles in ferroelectric liquid crystal, highlighting the basic characteristics of nanoparticles. The linear relationship between the concentration of nanoparticles and NSET parameters and quenching efficiency provides insights for sensing applications requiring high sensitivity.
Article
Food Science & Technology
Endang Susilowati, Lina Mahardiani, Retno Duwi Hardini
Summary: Silver-alginate nanocomposite films with antibacterial properties were prepared using the casting method. The properties of the films were characterized through various tests. The presence of silver nanoparticles affected the mechanical properties and crystallinity of the films, which also exhibited a rough and porous structure. The nanocomposite films showed antibacterial activity against different bacteria, and the activity was dependent on the concentration of silver nanoparticles.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2022)
Article
Biochemistry & Molecular Biology
C. S. Karthik, M. H. Chethana, H. M. Manukumar, A. P. Ananda, S. Sandeep, S. Nagashree, L. Mallesha, P. Mallu, H. S. Jayanth, B. P. Dayananda
Summary: This study synthesized benzodioxane coupled piperazine decorated chitosan silver nanoparticles (Bcp*C@AgNPs) and evaluated its antibacterial and anti-biofilm properties against methicillin-resistant Staphylococcus aureus (MRSA). The nanoparticles showed effective antibacterial activity and a reduced toxic effect on myoblast cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)