Article
Materials Science, Multidisciplinary
Cheng Hung Chu, Gu Yu Lin, Pin Chieh Wu, Wei-Yang Chou, Sy-Hann Chen, Hsing-Chih Liang, Hai -Pang Chiang
Summary: This study proposes an innovative plasmonic sensing method using MIM nanohole arrays and AgNPs to measure refractive index changes in the surrounding medium. The hybrid substrates prepared using a combination of NSL, reactive ion etching, and plasmonic site-selective photocatalytic reaction show potentials for optical sensing applications.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Sy-Hann Chen, Wu-Jui Hsieh, Yi-Wen Hong, Hung Ji Huang, Li-Ming Chiang, Tsung Sheng Kao, Min-Hsiung Shih, Hai-Pang Chiang
Summary: This study introduces a novel approach to enhance electromagnetic fields interaction and reduce photoluminescence (PL) lifetime in plasmon-enhanced fluorescence. By fabricating gold (Au) nanohole arrays (ANA) decorated with ring-shaped silver nanoparticles (AgNPs) on a silicon-dioxide (SiO2)/silver (Ag) substrate, the surface plasmon resonance coupling and PL reactions are investigated. The proposed substrate shows a remarkable enhancement of PL intensity and a reduction in PL lifetime. The findings demonstrate the potential of using ANAs decorated with ring-shaped AgNPs in biosensing, imaging, and photonics.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shahab Razavi, Yiping Zhao
Summary: This study demonstrates that a hybridized plasmonic mode in a compound nanohole structure can be described as a quasi-dipole oscillator. By introducing two nanorods into a nanohole, these two quasi-dipoles can couple and hybridize, resulting in additional transmission peaks. The intensities and separations of these peaks can be controlled by adjusting the incident polarization and modifying the nanorod length. This concept can be extended to predict the behavior of more complex compound configurations, allowing for precise engineering of transmission peaks.
Article
Nanoscience & Nanotechnology
Bryson Krause, Minh T. Pham, Hoang M. Luong, Tho D. Nguyen, Thang B. Hoang
Summary: Nanohole arrays can enhance the lasing emission of organic dye liquid gain medium and accelerate the decay rate of CdSe quantum dots. They are simple to fabricate, exhibit excellent optical responses, and have great potential in various emerging technologies such as gas sensing, biomedical imaging, and ultrafast on-chip coherent light sources.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Bryson Krause, Minh T. Pham, Hoang M. Luong, Tho D. Nguyen, Thang B. Hoang
Summary: Periodic arrays of air nanoholes in thin metal films can enhance light-matter interactions at the nanoscale. A simple technique of fabricating hexagonal nanohole arrays is employed, which offers excellent optical responses and can be used for enhanced lasing and spontaneous emission of novel nanomaterials.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xie He, Qijie Cao, Jing Pan, Liu Yang, Sailing He
Summary: Transparent conductive electrodes (TCEs) are experimentally demonstrated using patterned few nanometer-thick silver films on zinc oxide-coated rigid and flexible substrates. The ultrathin TCE, with high transparency and low sheet resistance, breaks the optical limits of unpatterned film counterparts and achieves superior figure of merit compared to thick metal grid TCEs.
Article
Chemistry, Physical
Yanting Feng, Yu Wang, Fenglan Shao, Lingyan Meng, Mengtao Sun
Summary: This study investigates the impact of nanoslit parameters on the enhancement factor (EF) of SECARS in Au nanohole-slit arrays. It is found that nanoslit structures significantly improve the EF of SECARS, providing directional emission and stable 2D hotspots, which are useful for designing highly sensitive SECARS platforms.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
M. Novakovic, M. Popovic, P. Noga, D. Vana, C. Ronning
Summary: This study investigates the effects of pure silver and silver/gold co-implanted TiN thin films on their optical properties, significantly reducing optical losses and approaching the optical performance of pure gold. This optical tuning of TiN opens up new possibilities for its implementation in plasmonic applications.
Article
Nanoscience & Nanotechnology
Ruth F. Balderas-Valadez, Claudia Pacholski
Summary: By combining two porous materials, namely porous silicon and plasmonic nanohole arrays, the hybrid sensor achieves increased sensitivity and dual-mode sensing capabilities. The combination of porous silicon and plasmonic nanohole arrays results in higher reflectance and improved sensitivity, making it suitable for high-sensitivity sensing applications. The hybrid sensor demonstrates significant enhancement in sensitivity and ability to perform simultaneous and independent dual-mode sensing.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hiroshi Inaba, Yuma Hori, Arif Md. Rashedul Kabir, Akira Kakugo, Kazuki Sada, Kazunori Matsuura
Summary: Silver nanoparticles (AgNPs) and silver nanowires (AgNWs) are interesting nanomaterials that have attracted significant attention. Peptides/proteins can be used as templates for constructing uniform metal nanoparticles and nanowires, including AgNPs and AgNWs. In this study, a tandem peptide consisting of a Tau-derived peptide and a silver-binding peptide was used to grow AgNPs and AgNWs inside microtubules. The density and morphology of the AgNPs could be controlled by adjusting the incubation times and concentrations of the silver ion source and reductant. The developed AgNP-containing microtubules have potential applications in nano-electronics and dynamic nanomaterials.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2023)
Article
Nanoscience & Nanotechnology
Netrapal Singh, Hafsa Siddiqui, Manoj Goswami, Satendra Kumar, Mohammad Ashiq, Natarajan Sathish, Mysore Sridhar Santosh, Surender Kumar
Summary: Nanoscale-thick silver thin films (Ag-NTF) are fabricated on indium tin oxide-coated glasses through an electrochemical 3D printing process. The Ag-NTF electrode exhibits uniform and nanometer-thick film structure, with a mean crystallite size of 17 nm. The electrode shows excellent electrochemical activity, with a sensitivity of 25 +/- 1 mu A mM-1 cm-2 and a lower detection limit of 1.0 mu M for hydrogen peroxide sensing. The electrode also demonstrated good selectivity towards H2O2 and applicability in real-life samples.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Qiuling Wen, Xinyu Wei, Pengcheng Zhang, Jing Lu, Feng Jiang, Xizhao Lu
Summary: The research shows that the morphology and size of silicon nanoholes depend on the laser fluence, with well-ordered arrays of nanoholes fabricated at specific laser fluences. Coating the silicon surface with a nanolayered gold coating can significantly reduce the appearance of sputtered nanoparticles around the nanoholes and improve the smoothness of the inner surface. This simple method allows for fast fabrication of well-ordered nanoholes on silicon substrate without sputtered nanoparticles.
Article
Materials Science, Ceramics
Rayees Ahmad Zargar, Manju Arora, T. Alshahrani, Mohd Shkir
Summary: Zinc oxide and multiwall carbon nanotubes nanocomposites thick films were prepared through a sol-gel screen printing process and characterized using various techniques. Results showed that MWCNT doping reduced resistance, improving conductivity and color emission for low-cost optoelectronics devices.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Robert D. Neal, Zachary R. Lawson, Walker J. Tuff, Kaikui Xu, Vishal Kumar, Matiyas T. Korsa, Maksym Zhukovskyi, Matthew R. Rosenberger, Jost Adam, Jordan A. Hachtel, Jon P. Camden, Robert A. Hughes, Svetlana Neretina
Summary: This paper presents a benchtop process for the formation of large-area periodic arrays of gold nanotriangles, addressing the challenge of scaling up the formation of such arrays. The synthesized gold nanotriangles are epitaxially aligned with the substrate, have increased thickness compared to colloidal syntheses, and exhibit atomically flat surface with close-packed gold atoms, resulting in clear and distinct plasmonic modes.
Article
Chemistry, Multidisciplinary
Yun-Cheng Ku, Jiunn-Woei Liaw, Szu-Yao Mao, Mao-Kuen Kuo
Summary: Theoretical study on the transition of a helical surface plasmon polariton (SPP) from a circular nanohole in a thick metal film to a spiral SPP outward propagating at the film's interface shows that the propagation length of mode-1 SPP is significantly longer than other modes in a specific frequency band, depending on the nanohole size. Numerical results demonstrate that most of the energy flux fanning out at the outlet as a dipole radiation after a helical SPP tunnels through a nanohole.
