Article
Materials Science, Multidisciplinary
Nowshin Akhtary, Ahmed Zubair
Summary: Light-trapping mechanisms with plasmonics, especially using TiN nanoparticles, have proven effective in enhancing the efficiency of photovoltaics. TiN-based dimer-shaped nanoparticles demonstrate superior light absorption and scattering capabilities compared to other plasmonic materials like Ag, Au, and Al, resulting in a significant increase in absorbed power over the entire spectral range. The maximum optical absorption efficiency of the plasmonic TiN nanostructures was found to be -35.46%.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Chemistry, Physical
Andrea Rogolino, Nathalie Claes, Judit Cizaurre, Aimar Marauri, Alba Jumbo-Nogales, Zuzanna Lawera, Joscha Kruse, Maria Sanroman-Iglesias, Ibai Zarketa, Unai Calvo, Elisa Jimenez-Izal, Yury P. Rakovich, Sara Bals, Jon M. Matxain, Marek Grzelczak
Summary: This work presents the use of a water-soluble conjugated polymer as a surface ligand for gold nanoparticles to achieve plasmonic catalysis under visible light. The metal-polymer heterojunction, rich in sulfonate functional groups, contributes to the interaction between electron-donor molecules and the plasmonic photocatalyst. The tight binding of the polymer to the gold surface eliminates the need for conventional transition-metal surface cocatalysts and enhances the reactivity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Applied
Domna G. Kotsifaki, Viet Giang Truong, Sile Nic Chormaic
Summary: This work demonstrates the sequential trapping of 20nm particles using metamaterial plasmonic optical tweezers, with the investigation of multiple trapping via trap stiffness measurements for various trapping configurations. The plasmonic configuration could be utilized as a light-driven nanoscale sorting device, offering an alternative method to trap multiple nanoparticles at distinct hotspots and control mass transport on the nanoscale.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Danthure Arachchige Dayantha Lankanath Karunasena, Guangqing Du, Qing Yang, Gulshan Iqbal, Noor Uddin, Xun Hou, Feng Chen
Summary: Theoretical investigation into stable plasmonic trapping of sub-50nm targets using integrated gold-graphene V-trench with deep potential well. A hybrid plasmonic trapping model considers surface plasmons excitation for supporting scattering and gradient optical forces on nano-scale. Experimental results demonstrate successful trapping of 40nm gold nano-sphere within designed nano-V-trench with extremely deep potential well, showcasing potential applications in nano-manipulations.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Zhan-Hong Lin, Jiwei Zhang, Jer-Shing Huang
Summary: An achiral platform using elliptical nanoholes for chiroptical analysis and nanoparticle trapping is demonstrated. This platform shows enantioselectivity for dielectric nanoparticles and less pronounced selectivity for plasmonic nanoparticles. The use of linearly polarized excitation is expected to minimize background noise and make the platform easily compatible with commercial optical microscopes.
Article
Chemistry, Physical
Mohammad Khaywah, Audrey Potdevin, Francois Reveret, Rachid Mahiou, Youcef Ouerdane, Anthony Desert, Stephane Parola, Genevieve Chadeyron, Emmanuel Centeno, Rafik Smaali, Antoine Moreau
Summary: Improving phosphor photoluminescence efficiency by utilizing colloidal silver nanocubes on a luminescent surface has been shown to significantly enhance fluorescence. Experiments on two materials demonstrate that optimal nanoparticle density can increase emission efficiency, with a more pronounced enhancement in the photoluminescence signal of optical quartz.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Eric S. A. Goerlitzer, Meichen Zhan, Sukyung Choi, Nicolas Vogel
Summary: Colloidal lithography is a simple and convenient method for fabricating complex nanostructures using self-assembled particle monolayers as lithographic masks. However, imperfections in the process can impair the optical quality of arrayed nanostructures. This study emphasizes the importance of detailed structure-property relationships and reveals the individual role of packing order, organic impurities, and solid polymer bridges on the optical properties of nanohole arrays.
Review
Optics
Yuquan Zhang, Changjun Min, Xiujie Dou, Xianyou Wang, Hendrik Paul Urbach, Michael G. Somekh, Xiaocong Yuan
Summary: This paper reviews the principles and developments of plasmonic tweezers techniques, including their applications in manipulating small particles, sorting, sensing, imaging, and particularly in the biological context. The future prospects and potential applications of this technique are also discussed.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Hongchang Deng, Dawei Chen, Rui Wang, Fuwang Li, Zhongyue Luo, Shijie Deng, Jun Yin, Lingyao Yu, Wentao Zhang, Libo Yuan
Summary: The study proposes a novel capillary optical fiber tweezer (COFT) that breaks the limitation of the optical trapping direction and extends the spatial range of optical trapping. By introducing a cascade structure and using multimode excitation techniques, COFT enables multi-point trapping and long-range transport of microparticles.
Article
Optics
Yin Liu, Qiming Liao, Zhipeng Wang, Yu Bi, Lingling Huang, Yongtian Wang, Xiaowei Li
Summary: The plasmonic fiber-tip based on metallic metasurface and multimode fiber alleviates the limitation of large sensing size and provides a promising way to manipulate light through localized surface plasmon resonance. A compact magnetic field fiber-optic sensor, combining the advantages of plasmonic fiber-tip and magnetic fluid, has been proposed and experimentally verified with linear response and high magnetic strength sensitivity. The results also demonstrate the feasibility of pseudo-vector magnetic field sensing.
Article
Optics
Wenjun Zhang, Yuquan Zhang, Shuoshuo Zhang, Yulong Wang, Wu Yang, Changjun Min, Xiaocong Yuan
Summary: By controlling the geometric parameters of micro- and nano-structures and using pulsed lasers with high peak power, optical forces and potential wells in surface plasmon optical tweezers based on gold bowtie structures can be dynamically modulated, offering a new approach for stable trapping and dynamic control of particles.
Article
Engineering, Electrical & Electronic
Fanfan Lu, Wending Zhang, Min Liu, Lu Zhang, Ting Mei
Summary: Tip-based plasmonic nanofocusing is a novel optical microscope integrating surface plasmons and a sharp metal tip, which generates highly localized enhanced electric field and provides morphological information. This technique can be used to understand the nano-world, including spatial structures of chemicals and physical, electronic, and catalytic properties of substances.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Fanfan Lu, Wending Zhang, Lixun Sun, Ting Mei, Xiaocong Yuan
Summary: A substrate with a circular nanocavity is proposed in this study to enhance the nanofocusing and optical trapping characteristics of plasmonic tip nanofocusing. Experimental results show that the electric field intensity can be further increased on this substrate, allowing for stable trapping of small nanoparticles.
Article
Biophysics
Yangxi Zhang, Hao Wu, Han Wang, Bohan Yin, Siu Hong Dexter Wong, A. Ping Zhang, Hwa-Yaw Tam
Summary: This study presents an ultraminiature biosensor based on nanoparticles and optical fibers, capable of detecting antibodies and testing SARS-CoV-2 mimetic DNA. The biosensor offers a cost-effective solution for various applications.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Nabarun Polley, Samim Sardar, Peter Werner, Ingo Gersonde, Yuya Kanehira, Ilko Bald, Daniel Repp, Thomas Pertsch, Claudia Pacholski
Summary: In this research, optical fibers equipped with plasmonic flow sensors were fabricated as photothermomechanical nanopumps for active transport of target analytes. The nanopumps were prepared by stacking a thermoresponsive polymer monolayer and a plasmonic nanohole array on an optical fiber tip. The pump mechanism relied on the temperature-dependent collapse and swelling of the polymer, while the required heat was generated by the photo thermal effect in the plasmonic nanohole array. Simultaneous detection of analytes was achieved by monitoring changes in the plasmonic sensor's optical response. The active mass transport through the nanohole array was visualized using particle imaging velocimetry. The presence of the pump mechanism led to a 4-fold increase in sensitivity compared to the purely photothermal effect, demonstrating the potential of these photothermomechanical nanopumps for sensing applications.
