Article
Chemistry, Physical
Jiahao Pan, Xiaoyao Wang, Jinjin Zhang, Qin Zhang, Qiangbin Wang, Chao Zhou
Summary: By assembling helical plasmonic nanorods with intrinsic chirality, we have created plasmonic metamolecules with both chiral coupling and intrinsic chiroptical responses. These metamolecules offer more dimensions for tailoring chiroptical responses and make it more flexible to design plasmonic nanodevices with custom PCD.
Article
Chemistry, Physical
Jiahao Pan, Xiaoyao Wang, Jinjin Zhang, Qin Zhang, Qiangbin Wang, Chao Zhou
Summary: Significant chiroptical responses can be achieved by chiral coupling of achiral plasmonic nanoparticles or from intrinsic chirality of plasmonic nanoparticles. This study demonstrates the creation of dimeric plasmonic metamolecules with both chiral coupling and intrinsic chiroptical responses. These metamolecules provide more versatility in tailoring chiroptical responses and designing plasmonic nanodevices with custom plasmonic circular dichroism (PCD).
Article
Chemistry, Multidisciplinary
Xiaojun Song, Yueliang Wang, Yan Hao, Qingqing Zhu, Yanjuan Li, Lei Song, Zhaoxiang Deng
Summary: This study successfully built a series of homo/heterodimeric plasmonic nanomolecules with prescribed compositions using DNA-guided, solvo-driven Ag ion soldering method. Strong in-solution electric-dipole coupling was achieved for materials with strong (Au, Ag) or damped (Pt, Pd) plasmonic responses.
Article
Chemistry, Applied
Jin-Feng Liao, Ya-Ting Cai, Jun-Yan Li, Yong Jiang, Xu-Dong Wang, Hong-Yan Chen, Dai-Bin Kuang
Summary: The optoelectronic performance of CsPbBr3 nanocrystal is limited by charge carrier recombination and narrow light absorption range, which can be resolved through coupling with plasmonic Au nanoparticles. The CsPbBr3-Au nanocomposite exhibits excitation-wavelength dependent carrier transfer behavior, leading to improved CO2 photocatalytic reduction activity.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yunpeng Lin, Jinyong Hu, Wenbo Zhang, Li Jiang, Deqi Yi, Thitima Rujiralai, Jie Ma
Summary: This study developed an enhanced Ag@Au dimer optical antenna that achieved broadband fluorescence enhancement throughout the visible spectrum by utilizing nano-sized silver and gold. Compared to traditional silver dimer optical antennas, the Ag@Au dimer antenna exhibited improved optical response in the blue range and maintained superior chemical stability and accessibility to functionalization.
Article
Spectroscopy
Bilal Ahmed, Abdallah M. Elgorban, Ali H. Bahkali, Jintae Lee, Asad Syed
Summary: The study developed a probe for selective and sensitive detection of L-cysteine using gold nanoparticles, showing high accuracy in quantifying Cys from various biological samples even in the presence of other amino acids. The proposed Au NPs sensor exhibited excellent reproducibility and selectivity for Cys detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Kasturi Gogoi, Srimanta Pal, Arun Chattopadhyay
Summary: An assembly of gold nanoparticles through ligand interaction with short linker molecule 2-picolylamine (PA) is developed to form a strain sensitive network. By combining the nanoparticle network with a lithographically patterned polydimethylsiloxane (PDMS) microstructure, a multistimuli-responsive tactile sensor is created that can effectively transduce mechanical strain to electrical responses. This sensor can identify variable weights, detect finger touch patterns, and has high sensitivity to vibrational movements. In addition, it exhibits strain-dependent plasmonic photodetection properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Oscar A. Douglas-Gallardo, Connor L. Box, Reinhard J. Maurer
Summary: The study focuses on the optical, electronic, and catalytic properties of metallic Mg nanoclusters and finds they can produce highly energetic hot electrons, promoting hydrogen dissociation reactions. Mg nanoclusters show promising potential for use in light-driven hydrogen storage and release.
Article
Chemistry, Multidisciplinary
Bin Lu, Karol Vegso, Simon Micky, Christian Ritz, Michal Bodik, Yuriy Myronovych Fedoryshyn, Peter Siffalovic, Andreas Stemmer
Summary: In this work, a method for fabricating large-area gold nanoparticle superlattices with subnanometer interparticle gaps is demonstrated. The electrical transport measurements reveal significant variations in the nanogap conductance, while in situ optical reflectance measurements show enhanced plasmonic capacitive coupling with decreasing interparticle gap distance. The resulting superlattices also exhibit tunable effective refractive index and extreme field confinement in the high-density subnanometer plasmonic gaps.
Article
Chemistry, Physical
Rishi Verma, Ritaj Tyagi, Vamsee K. K. Voora, Vivek Polshettiwar
Summary: In this study, the use of nickel-loaded black gold catalyst (black Au-Ni) that absorbs broadband light for photocatalytic hydrodechlorination and propene and acetylene hydrogenation reactions was demonstrated. The black Au-Ni catalyst showed significantly higher activity compared to black Au. The reaction mechanism was supported by various experimental and theoretical evidence, indicating the involvement of photothermal effect and hot carriers in the hydrodechlorination reactions.
Article
Chemistry, Multidisciplinary
Qiong Wu, Chengcheng Liu, Cheng Cui, Long Li, Lu Yang, Yuan Liu, Hoda Safari Yazd, Shujuan Xu, Xiang Li, Zhuo Chen, Weihong Tan
Summary: The research indicates that the absorption peaks of DNA-templated Ag nanoclusters are sensitive to the assembled distances and exhibit characteristics of plasmon coupling; TDDFT simulations suggest that the absorption originates from plasmons, and the consistent trend between experimental and simulation results implies the possibility of plasmon coupling. DNA-AgNCs have the potential to be promising materials for constructing plasmon-coupling devices with ultra-small size, site-specific and stoichiometric binding abilities, and biocompatibility.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Tharaka Perera, Sudaraka Mallawaarachchi, Malin Premaratne
Summary: The paper introduces an ab initio model for characterizing chiral ellipsoidal metal nanoparticles, demonstrating its reduction to the general Mie-Gans model under nonchiral conditions, accurate prediction of experimental results, and wide applicability in metamaterial design.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Jordi Volders, Ken Elen, Arno Raes, Rajeshreddy Ninakanti, An-Sofie Kelchtermans, Francesc Sastre, An Hardy, Pegie Cool, Sammy W. Verbruggen, Pascal Buskens, Marlies K. Van Bael
Summary: This study demonstrates the conversion of CO2 and H-2 to CO using plasmonic Au/TiO2 nanocatalysts and artificial sunlight as the energy source. The activity and selectivity of the catalyst are influenced by the size of Au nanoparticles and light intensity. The catalytic activity of Au/TiO2 increases exponentially with increasing light intensity.
Article
Chemistry, Multidisciplinary
Sanghwa Lee, Megalamane S. Bootharaju, Guocheng Deng, Sami Malola, Hannu Hakkinen, Nanfeng Zheng, Taeghwan Hyeon
Summary: Heteroatom-doped metal nanoclusters are synthesized by a metal-exchange strategy, leading to the discovery that Pt doping can significantly enhance the catalytic activity of Cu nanoclusters by around 300-fold. This synthetic approach has the potential to produce Ni-, Pd-, and Au-doped Cu nanoclusters, opening new avenues for studying their molecular structures and catalytic properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Ravi Pamu, Benjamin J. Lawrie, Bamin Khomami, Dibyendu Mukherjee
Summary: The study investigated wavelength-dependent plasmon-enhanced photocurrents from PSI immobilized around highly ordered Au (AuND) and Ag (AgND) nanodisks. The results showed significant enhancements in photocurrents at specific excitation wavelengths, paving the way for rational assembly of future biohybrid structures.
ACS APPLIED NANO MATERIALS
(2021)