Article
Chemistry, Multidisciplinary
Daniel J. Rizzo, Sara Shabani, Bjarke S. Jessen, Jin Zhang, Alexander S. McLeod, Carmen Rubio-Verdu, Francesco L. Ruta, Matthew Cothrine, Jiaqiang Yan, David G. Mandrus, Stephen E. Nagler, Angel Rubio, James C. Hone, Cory R. Dean, Abhay N. Pasupathy, D. N. Basov
Summary: The researchers successfully created nanometer-scale lateral p-n junctions using graphene/alpha-RuCl3 heterostructure near graphene nanobubbles. Through STM/STS and s-SNOM techniques, they investigated the electronic and optical responses of nanobubble p-n junctions, achieving p-n junctions with a width of around 3 nm and an electric field of approximately 10(8) V/m. The study also utilized ab initio density functional theory calculations to corroborate experimental data and provide insights into charge transfer mechanisms in 2D materials.
Article
Optics
Loubnan Abou-Hamdan, Claire Li, Riad Haidar, Valentina Krachmalnicoff, Patrick Bouchon, Yannick de Wilde
Summary: This study experimentally measured the far-field electromagnetic response of a thermally excited asymmetric square MIM antenna dimer, observing hybrid bonding and anti-bonding modes and analyzing their effects on the far-field response using a plasmon hybridization model.
Article
Optics
Xiangbo Zhou, Mingming Jiang, Kai Xu, Maosheng Liu, Shulin Sha, Shuiyan Cao, Caixia Kan, Da Ning Shi
Summary: This study presents an electrically driven single-mode microlaser based on gallium incorporated zinc oxide microwire. The use of Pt and MgO buffer layers allows for the engineering of band alignment and optimization of current injection, resulting in a well-designed device structure that seamlessly integrates the electron-hole recombination region, gain medium, and optical microresonator.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Kelvin Yao, Felix Steinbach, Martin Borchert, Daniel Schick, Dieter Engel, Filippo Bencivenga, Riccardo Mincigrucci, Laura Foglia, Emanuele Pedersoli, Dario De Angelis, Matteo Pancaldi, Bjorn Wehinger, Flavio Capotondi, Claudio Masciovecchio, Stefan Eisebitt, Clemens von Kor Schmising
Summary: Researchers have demonstrated the ultrafast emergence of all-optical switching on the nanometer length scale by exciting transient magnetic gratings in a GdFe alloy using interfered coherent femtosecond light pulses in the extreme ultraviolet spectral range, and probing the subsequent evolution of the magnetization pattern through diffraction techniques.
Article
Optics
Victor Pacheco-Pena, Toby Hallam, Noel Healy
Summary: MXenes, as an emerging class of two-dimensional materials, show significant potential for use in next generation optoelectronic sensors. By tuning the plasma frequencies, they can produce plasmon resonances across different spectral ranges, adding a degree of freedom to the sensing mechanism.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Mazdak Afshar Bakshloo, Safia Yahiaoui, Matthieu Bourderioux, Regis Daniel, Manuela Pastoriza-Gallego, John J. Kasianowicz, Abdelghani Oukhaled
Summary: Alpha-synuclein plays a crucial role in regulating nerve activity. Mutations in this protein can lead to its aggregation and fibril formation, which is associated with neurodegenerative diseases like Parkinson's. Our study demonstrates that a nanometer-scale pore can effectively distinguish between different forms of alpha-synuclein, including wild-type, mutated, and post-translationally modified variants.
ACS CHEMICAL NEUROSCIENCE
(2023)
Article
Physics, Applied
Ze Zhang, Archith Rayabharam, Joel Martis, Hao-Kun Li, Narayana R. Aluru, Arun Majumdar
Summary: Researchers have proposed a method that combines spectrally specific photoabsorption with sub-nanometer scale resolution TEM for imaging nanoscale optical phenomena. They have shown the potential to study sub-nanometer scale photoexcited states in core-shell quantum dots and hexagonal boron nitride.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Dong Kyo Oh, Yeseul Kim, Jaekyung Kim, Inki Kim, Junsuk Rho
Summary: This study introduces a guided domino lithography method for the fabrication of uniform ultra-sharp nanoantenna arrays. By collapsing unstable photoresist nanostructures with a guide structure, ultra-sharp bowtie photoresist masks can be uniformly fabricated. The yields of conventional and guided domino lithography are compared under optimized conditions. The electric field enhancement effect of ultra-sharp bowtie nanoantennas with different geometries is rigorously analyzed. Guided domino lithography shows promise as a practical manufacturing method for single-digit-nanometer plasmonic nanoantennas.
Article
Engineering, Mechanical
Arnaud Caron
Summary: This study investigates the friction between PDMS and SiOx in single asperity sliding contact using AFM. Friction has two dependencies on the normal force: a tensile regime and a compressive regime. Friction in the compressive regime is governed by shear deformation and rupture of junctions, while in the tensile regime, it is also affected by junction elongation. The single SiOx-asperity exhibits stick-slip motion on PDMS in both regimes. Statistical analysis allows determining the energy required to break a SiOx/PDMS junction.
Article
Engineering, Electrical & Electronic
Hyun-Tae Kim, Miao Yu
Summary: We report an ultracompact on-fiber multiparameter sensor that employs multiple guided-wave surface plasmon resonances and machine learning based signal processing. The sensor is capable of simultaneous measurement of multiple parameters and utilizes a neural network model to enhance the sensing accuracy. A proof-of-concept sensor using a UV-curable polymer as a waveguide material is demonstrated for simultaneous measurement of temperature and salinity of salt solutions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jin-Woo Cho, Eun-Joo Lee, Sun-Kyung Kim
Summary: The study demonstrates that inversely designed TiN/ZnS/Ag coatings in a trilayer configuration achieve a wide color gamut and efficient heat dissipation, while showing good resistance to solar radiation.
Article
Multidisciplinary Sciences
Roman Schmidt, Tobias Weihs, Christian A. Wurm, Isabelle Jansen, Jasmin Rehman, Steffen J. Sahl, Stefan W. Hell
Summary: The MINFLUX concept has advanced the resolution of fluorescence microscopy to molecular dimensions, achieving 1-3 nm resolution in three dimensions. This widely applicable technique allows for nanometer-precise and accurate real-time localization of individually activated fluorophores, with potential applications in cellular and neurobiological research.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Bo Yao, Yunze Yang, Nanxi Yu, Nongjian Tao, Di Wang, Shaopeng Wang, Fenni Zhang
Summary: This article introduces an optical imaging method to measure molecular interactions with live cells by tracking nanometer membrane fluctuations. The elastic properties of the cell are determined through analysis of the data, as well as the binding kinetics of glycoprotein to lectins. The method is anticipated to contribute to the understanding of cell interactions, mechanical assessment of diseases like cancer, and screening of membrane protein targeting drugs.
Article
Physics, Multidisciplinary
Songsong Li, Yangyang Fu, Lei Gao, Jian-Hua Jiang, Yadong Xu
Summary: In this study, the concept of phase gradient metasurfaces is demonstrated to be a versatile approach for controlling light diffraction through small holes or slits. A single subwavelength metallic slit surrounded by air grooves of gradient depth is considered as an example. The phase gradient enables unidirectional excitation of surface plasmons, resulting in extraordinary optical transmission. Unidirectional radiation of an optical dipole inside the slit can be achieved by applying different phase gradients to both sides of the metal plate.
NEW JOURNAL OF PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Gerald Ekechukwu, Jyotsna Sharma
Summary: Distributed fiber optic sensors (DFOSs) are widely used for real-time monitoring of temperature, strain, vibration, etc. However, the quality of the measurements depends on the strength of the optical signal. This study found that microbending is the main cause of signal degradation in both single-mode and multimode fibers, and provided recommendations for minimizing degradation.
IEEE SENSORS JOURNAL
(2023)