Review
Chemistry, Multidisciplinary
Ben Tadgell, Luis M. Liz-Marzan
Summary: Chiral plasmonic nanoparticles interact with biomolecules in distinct ways and can be probed using circular dichroism spectroscopy, offering potential advantages in biosensing and biomedical applications.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Tomoya Oshikiri, Quan Sun, Hiroki Yamada, Shuai Zu, Keiji Sasaki, Hiroaki Misawa
Summary: The study examines the chiral near-field intensity distribution on achiral gold nanorectangular structures under circularly polarized light, attributing the extrinsic chirality to the interference between two plasmonic modes. The intensity and phase angle of each mode under linearly polarized light are critical factors for the generation of extrinsic chirality in the near-field intensity distribution.
Article
Chemistry, Multidisciplinary
Lingling Zhang, Yilin Chen, Jiapeng Zheng, George R. Lewis, Xinyue Xia, Emilie Ringe, Wei Zhang, Jianfang Wang
Summary: This study reports on a new type of chiral nanoparticle, chiral Au nanorod with five-fold rotational symmetry, which is synthesized using chiral molecules. The chiroptical responses of the chiral Au nanorods are optimized by systematically varying the synthesis parameters. The chiroptical signals of the individual chiral Au nanorods and their end-to-end dimers are similar, while those of the side-by-side dimers are largely reduced due to the coupling effect between the plasmon resonance modes. This study enriches the types of chiral plasmonic nanoparticles and provides valuable insights for the design of nanostructures with desired chiroptical properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Te Bai, Jing Ai, Jie Ma, Yingying Duan, Lu Han, Jingang Jiang, Shunai Che
Summary: The study reveals resistance-chiral anisotropy in chiral mesostructured Fe3O4 films, showing different electrical conductivity properties for different chiralities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Shenli Wang, Xing Liu, Stefanos Mourdikoudis, Jie Chen, Weiwei Fu, Zdenek Sofer, Yuan Zhang, Shunping Zhang, Guangchao Zheng
Summary: This article summarizes and discusses the role of chiral gold nanorods in the interaction between light and matter, as well as the origin of chirality, chirality transfer, and chiroptical activities. The study is of great significance for manipulating chirality at the nanoscale, revealing natural evolution processes, and circularly polarized applications.
Article
Chemistry, Physical
Meng-Ying Lin, Wen-Hui Xu, Rashid G. Bikbaev, Jhen-Hong Yang, Chang-Ruei Li, Ivan Timofeev, Wei Lee, Kuo-Ping Chen
Summary: The study discovered chiral-selective Tamm plasmon polariton at the interface between a cholesteric liquid crystal and a metasurface. Unlike conventional TPP, the new TPP demonstrated successful chiral-achiral conversion and tunability. The metasurface design as a reflective half-wave plate facilitated phase and polarization matching, leading to strong localized electric fields and sharp resonance.
Article
Materials Science, Multidisciplinary
Thinhinane Aoudjit, Andreas Horrer, Sergei Kostcheev, Renaud Bachelot, Jerome Plain, Davy Gerard
Summary: This article reports a subwavelength imaging approach based on the interaction between the enhanced optical near-field around chiral nanoparticles and an azobenzene molecular probe. It is experimentally demonstrated that the near-field of chiral structures exhibit dissymmetry under left and right circular polarizations. The near-field dissymmetry factor, related to the local circular dichroism of the near-field intensity, can be experimentally mapped.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Analytical
Vivek Semwal, Oliver Rishoj Jensen, Ole Bang, Jakob Janting
Summary: This paper presents numerical and experimental results on the effects of spherical gold nanoparticles (AuNPs) size on Localized Surface Plasmon Resonance (LSPR) refractive index (RI) sensitivity, Figure of Merit (FoM), and penetration depth (dp). The study also investigates the influence of AuNP dimer interparticle distance (ds) on these parameters. The results show that a diameter of 60 nm AuNPs provides the best FoM. Furthermore, the interparticle distance between d = 20 nm and 60 nm AuNPs significantly affects the RI sensitivity. The importance of penetration depth information for biosensing using aptamers is discussed in relation to aptamer size.
Article
Chemistry, Multidisciplinary
Steffen Both, Martin Schaeferling, Florian Sterl, Egor A. Muljarov, Harald Giessen, Thomas Weiss
Summary: Nanophotonic chiral sensing, which exploits the strong light-matter interaction in nanophotonic resonators, has gained significant attention for its potential applications in life science and chemistry. However, a comprehensive understanding of the underlying interactions is still lacking. In this study, we present a general theory that describes chiral light-matter interactions in arbitrary resonators, providing deep insights for customization and enhancement of such interactions. Our theory efficiently predicts spectra and identifies two dominant contributions: chirality-induced resonance shift and changes in excitation and emission efficiencies of the resonator modes.
Article
Materials Science, Ceramics
Shujuan Zhang, Cuicui Lei, Limin Song
Summary: A novel chiral Ag@Ag3PO4-NaDC composite was synthesized by chiral induction. The introduction of chirality can obviously promote the light absorption ability, broaden the band gap, enhance the oxidation ability, promote the separation of electrons and holes, greatly enhance the plasma resonance effect of silver nanoparticles, and promote the synergistic effect between silver nanoparticles and silver phosphate. Compared with Ag@Ag3PO4, the catalytic degradation ability of chiral Ag@Ag3PO4-NaDC is improved by more than 60%. Therefore, the chiral Ag@Ag3PO4-NaDC composite exhibits excellent photocatalytic performance.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Guangchao Zheng, Sulin Jiao, Wei Zhang, Shenli Wang, Qinghua Zhang, Lin Gu, Weixiang Ye, Junjun Li, Xiaochen Ren, Zhicheng Zhang, Kwok-yin Wong
Summary: Accurate research on the applications of chiral plasmonic metal nanoparticles with surface plasmon resonance (SPR) still face challenges. This study demonstrates the production of chiral plasmonic metal nanoparticles with tunable chiroptical activities. The results show that the chiral properties can be precisely tailored by adjusting the longitudinal SPR (LSPR) and the amount of gold nanorods as seeds. The functionalization of a shell of another metal or semiconductor can also achieve a shift of the chiral properties within the UV-vis-NIR region. Chirality transfer from the gold core to the silver shell leads to new chiral properties in the near-UV region.
Article
Chemistry, Multidisciplinary
Amir Ziv, Omer Shoseyov, Prajith Karadan, Brian P. Bloom, Sharone Goldring, Tzuriel Metzger, Shira Yochelis, David H. Waldeck, Roie Yerushalmi, Yossi Paltiel
Summary: A nanoscale chirality sensor has been proposed for continuously monitoring molecular chirality in real-time and for chiral recognition of small quantity samples, utilizing a gold nanofloret hybrid structure.
Article
Chemistry, Multidisciplinary
Marco Esposito, Mariachiara Manoccio, Angelo Leo, Massimo Cuscuna, Yali Sun, Eduard Ageev, Dmitry Zuev, Alessio Benedetti, Iolena Tarantini, Adriana Passaseo, Vittorianna Tasco
Summary: The fine control of chiral light-matter interaction at the nanoscale using designed metamaterial architecture is a cutting-edge craft with applications in biosensing, quantum, and classic nanophotonics. A novel concept of a 3D chiral metacrystal is proposed, where chiroptical properties are finely tuned by in-plane and out-of-plane diffractive coupling, showing potential for enantiomeric detection and integration with quantum emitters.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Po-Ting Chiu, Chih-Ying Yang, Zhi-Hong Xie, Ming-Yao Chang, Yu-Chueh Hung, Rong-Ming Ho
Summary: Chiral plasmonic films with gold nanohelices were fabricated using enantiomeric polylactide-based block copolymers as templates for templated electroless plating. By controlling helicity during self-assembly, mirror-image signals were identified in electronic circular dichroism spectra, and the chiral plasmonic properties were confirmed through simulation using finite-difference time-domain method. This study provides insights into the fabrication of chiral plasmonic materials for optical applications.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fengxia Wu, Fenghua Li, Yu Tian, Xiali Lv, Xiaoxi Luan, Guobao Xu, Wenxin Niu
Summary: Surface roughness in chiral plasmonic nanostructures generates asymmetrical localized electromagnetic fields, which hold great promise for applications in chiral recognition, chiroptical spectroscopic sensing, and enantioselective photocatalysis. This study develops a surface topographical engineering approach to precisely manipulate the surface structures of chiral Au nanocrystals, and successfully synthesizes chiral Au nanocrystals with highly disordered, ordered, and less ordered wrinkled surfaces. The chiral ordered wrinkles on the surfaces of the nanocrystals generate asymmetrical localized electronic fields with enhanced intensity, which achieve excellent plasmon-enhanced chiral discrimination ability.
Article
Chemistry, Physical
Karolina Sokolowska, Zhongyue Luan, Eero Hulkko, Christoph Rameshan, Noelia Barrabes, Vartkess A. Apkarian, Tanja Lahtinen
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Christian Engelbrekt, Kevin T. Crampton, Dmitry A. Fishman, Matt Law, Vartkess Ara Apkarian
Editorial Material
Chemistry, Physical
V. Ara Apkarian, Eric Potma
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Instruments & Instrumentation
Joonhee Lee, Nicholas Tallarida, Laura Rios, V. Ara Apkarian
APPLIED SPECTROSCOPY
(2020)
Article
Nanoscience & Nanotechnology
Peter R. Stevenson, Robert T. Busch, Riccardo Torsi, Ali M. Jawaid, Rahul Rao, David B. Lioi, Joshua A. Robinson, Nicholas R. Glavin, Richard A. Vaia, W. Joshua Kennedy, Jonathan P. Vernon
Summary: This study demonstrates that changes in the optical response of monolayer MoS2 can be attributed to variations in the amplitude of measured excitons, suggesting the importance of charge transfer and local dielectric effects in quantum nanophotonic interactions. Additionally, reversible changes in the refractive index are observed due to dopant-induced screening effects, indicating the potential for tailored manipulation of optical constants in transition metal dichalcogenides. The findings highlight the significant impact of chemical adsorbates and film quality on the optical properties of MoS2 films, with implications for the development of advanced semiconductor nanophotonic technologies.
Article
Optics
Faisal Mehmood, Ruth Pachter, Tyson C. Back, John J. Boeckl, Robert T. Busch, Peter R. Stevenson
Summary: This study investigated the adsorption and intercalation behavior of Li, Na, K, and Ca adatoms in 2D MoS2 using first principles density functional theory, showing significant charge transfer and enhancement of optical response. The potential impact of adatom incorporation on electronic and optical responses in 2D MoS2 was emphasized, indicating important considerations for device development.
Article
Nanoscience & Nanotechnology
Lirong Sun, John G. Jones, John T. Grant, Neil R. Murphy, C. Ramana, Kurt G. Eyink, Jonathan P. Vernon, Peter R. Stevenson
Summary: HfO2 thin films deposited using pulsed laser deposition at different substrate temperatures exhibit different crystal phases and nanostructures, with minimal impact on the resulting optical properties in the nanoscale-thick films. The achievement of fully stoichiometric, high-density, thin-film HfO2 from PLD is expected to further enable thermally robust nanoscale photonic device integration involving low-dimensional high-performance optical and optoelectronic applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Coatings & Films
Michael Motala, Lucas K. Beagle, Jason Lynch, David C. Moore, Peter R. Stevenson, Anna Benton, Ly D. Tran, Luke A. Baldwin, Drake Austin, Christopher Muratore, Deep Jariwala, Nicholas R. Glavin
Summary: This study demonstrates the use of a MoS2-coated fiber-optic sensor for selective detection of chemical analytes. Changes in the transmission spectrum enable the differentiation of different analytes under different vapor exposure conditions. The sensor device exhibits high sensitivity and reusability.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
Robert T. Busch, Riccardo Torsi, Angelica Drees, David Moore, Andrew Sarangan, Nicholas R. Glavin, Joshua A. Robinson, Jonathan P. Vernon, W. Joshua Kennedy, Peter R. Stevenson
Summary: This study evaluates laterally coalescing monolayer MoS2 films using ex situ spectroscopic ellipsometry and demonstrates the ability to probe optical exciton behavior at growth-relevant grain sizes. It provides insights for the in situ epitaxial growth of 2D TMDC films with targeted optical properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
M. J. Motala, X. Zhang, P. Kumar, E. F. Oliveira, A. Benton, P. Miesle, R. Rao, P. R. Stevenson, D. Moore, A. Alfieri, J. Lynch, D. Austin, S. Post, G. Gao, S. Ma, H. Zhu, Z. Wang, I. Petrov, E. A. Stach, W. J. Kennedy, S. Vangala, J. M. Tour, D. S. Galvao, D. Jariwala, C. Muratore, M. Snure, P. M. Ajayan, N. R. Glavin
Summary: Manipulation of bulk material properties by controlling layer-by-layer chemistry and structure of nanomaterials has been achieved through a method to directly convert metal multilayer heterostructures to 2D van der Waals superlattices, heterostructures, and alloys. These materials exhibit novel bulk properties compared to individual 2D layers themselves, such as reduced bandgap, enhanced light-matter coupling, and improved catalytic performance.
MATERIALS TODAY NANO
(2023)
Article
Materials Science, Coatings & Films
Benjamen N. Taber, Matthew L. Neill, Trevor N. Thom, Octavia D. Clapp, Vartkess Ara Apkarian, Joonhee Lee
Summary: Among the components of a scanning tunneling microscope, the metallic tip directly interacts with the specimen and is crucial in visualizing the desired physical quantity. While tip materials like W and Pt-Ir are well-documented for topographic imaging, the standardized preparation of plasmonic materials such as Ag for tip-enhanced Raman spectroscopy is relatively lacking. This paper presents various in situ Ag tip preparation and validation techniques for different applications including atomic resolution imaging, scanning tunneling spectroscopy (STM), and tip-enhanced Raman spectro-microscopy in ultrahigh vacuum. These methods are not limited to Ag and can be applied to other STM tip materials.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Multidisciplinary Sciences
Alexander A. A. Milner, V. A. Apkarian, Valery Milner
Summary: Molecules immersed in liquid helium have been used as excellent probes to study superfluidity, providing valuable clues about the superfluid at the nanoscale through their electronic, vibrational, and rotational dynamics. In this study, we experimentally investigated the laser-induced rotation of helium dimers inside superfluid He-4 at different temperatures. We initiated controlled rotational dynamics of He2* using ultrashort laser pulses and tracked them using time-resolved laser-induced fluorescence. The observed temperature dependence suggests nonequilibrium evolution of the quantum bath and the emission of the wave of second sound. This method offers a way to study superfluidity with molecular nanoprobes under variable thermodynamic conditions.
Article
Nanoscience & Nanotechnology
David B. Lioi, Peter R. Stevenson, Bryan T. Seymour, Gregory Neher, Richard D. Schaller, David J. Gosztola, Richard A. Vaia, Jonathon P. Vernon, W. Joshua Kennedy
ACS APPLIED NANO MATERIALS
(2020)