Article
Chemistry, Multidisciplinary
Lei Yao, Qi Hao, Mingze Li, Xingce Fan, Guoqun Li, Xiao Tang, Yunjia Wei, Jiawei Wang, Teng Qiu
Summary: We propose and demonstrate sandwich plasmonic nanocavities as a surface-selection ruler to illustrate molecular orientations using surface-enhanced Raman spectroscopy. The field vector in the nanocavity presents a transverse spinning feature under specific excitations, allowing the selective amplification of Raman modes of target molecules. This method can be extended as a universal ruler for the identification of molecular orientations.
Article
Optics
Da-Jie Yang, Si-Jing Ding, Liang Ma, Qing-Xia Mu, Qu-Quan Wang
Summary: This study reveals the nature of recently reported plasmon modes by introducing the concept of SPP standing waves and an analytical model. The study systematically analyzes SPP standing waves within various nanocavities and explains some unusual phenomena. The research has significant implications for a comprehensive understanding and application of cavity plasmons in ultrasensitive bio-sensings.
Article
Chemistry, Multidisciplinary
Bisweswar Patra, Bijesh Kafle, Terefe. G. G. Habteyes
Summary: The interaction between nanocavity plasmons and molecular vibrations can be tailored for sensing and photocatalytic applications. In this study, laser-plasmon detuning dependent plasmon resonance linewidth broadening is observed, indicating energy transfer from the plasmon field to vibrational modes. The experimental results suggest that molecular optomechanics coupling can create hybrid properties based on interactions between molecular oscillators and nanocavity electromagnetic optical modes.
Article
Materials Science, Multidisciplinary
Zhenxin Wang, Lufang Liu, Di Zhang, Alexey V. Krasavin, Junsheng Zheng, Chenxinyu Pan, Enxing He, Zifan Wang, Shengchengao Zhong, Zhiyong Li, Mengxin Ren, Xin Guo, Anatoly V. Zayats, Limin Tong, Pan Wang
Summary: The effect of mirror quality on the optical response of nanocavities is studied. It is found that nanocavities formed on smooth metal mirrors have better cavity-to-cavity homogeneity and scattering intensity, while rough metal mirrors result in changes in the spectral positions of resonance modes.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Analytical
Jingbin Li, Junfang Li, Wencai Yi, Meng Yin, Yanling Fu, Guangcheng Xi
Summary: This paper reports the surface-enhanced Raman spectroscopy performance of metallic niobium nitride three-dimensional hierarchical network structures. The unique nanocavity structure promotes the entry of molecules and takes advantage of electromagnetic hot spots, and the substrate exhibits outstanding environmental durability, high signal reproducibility, and detection universality.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Katelyn Dixon, Minhal Hasham, Moein Shayegannia, Naomi Matsuura, Mark W. B. Wilson, Nazir P. P. Kherani
Summary: This study introduces a platform for broadband, polarization-independent field enhancement in the visible regime using width-graded nanocavities in a bullseye configuration. The fabrication process involves electron beam lithography (EBL) for precise control over the nanocavity geometry and template stripping for rapid and cost-effective production. The utility of these devices as substrates for multi-wavelength surface enhanced Raman spectroscopy (SERS) is demonstrated, highlighting the impact of bullseye geometry on the spectral response and SERS performance. The measured SERS enhancement factor (EF) primarily depends on the plasmonically active surface area of the device, providing design guidelines for optimizing the enhancement factor and broadband performance of similar devices.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Siyu Chen, Pan Li, Chi Zhang, Wenkai Wu, Guoliang Zhou, Changjin Zhang, Shirui Weng, Tao Ding, De-Yin Wu, Liangbao Yang
Summary: Fabricating ultrasmall nanogaps for significant electromagnetic enhancement is a long-standing goal of SERS research. The quantum plasmonics limits the electromagnetic enhancement when the gap size decreases below the quantum tunneling regime. In this study, by sandwiching hexagonal boron nitride (h-BN) as a gap spacer in a NPoM structure, electron tunneling is effectively blocked, leading to layer-dependent SERS enhancement.
Article
Chemistry, Multidisciplinary
Shu Hu, Eoin Elliott, Ana Sanchez-Iglesias, Junyang Huang, Chenyang Guo, Yidong Hou, Marlous Kamp, Eric S. A. Goerlitzer, Kalun Bedingfield, Bart de Nijs, Jialong Peng, Angela Demetriadou, Luis M. Liz-Marzan, Jeremy J. Baumberg
Summary: Bottom-up assembly of nanoparticle-on-mirror (NPoM) nanocavities enables precise inter-metal gap control down to approximate to 0.4 nm for confining light to sub-nanometer scales, thereby opening opportunities for developing innovative nanophotonic devices. However limited understanding, prediction, and optimization of light coupling and the difficulty of controlling nanoparticle facet shapes restricts the use of such building blocks.
Article
Chemistry, Multidisciplinary
Yu Zhang, Ying Su, Lin He
Summary: Vortices in graphene induced by single carbon defects can be considered as atomic-scale vortices mediated by pseudospin, with angular momenta of +2 and -2. Quantum interference measurements show that these vortices cancel each other, resulting in zero total angular momentum or aggregate chirality similar to a single vortex of the majority.
Article
Nanoscience & Nanotechnology
Qingzhang You, Ze Li, Yang Li, Lilong Qiu, Xinxin Bi, Lisheng Zhang, Duan Zhang, Yan Fang, Peijie Wang
Summary: Researchers have constructed a plasmonic gap cavity of a nanowire dimer system to enhance the emission brightness of MoS2. Unlike conventional enhancement in plasmonic hot spots, they investigated the light emission of nanogap hot spots. The study demonstrated that this new plasmonic optical nanostructure can significantly enhance the emission of MoS2 through the Purcell effect.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Tchiya Zar, Alon Krause, Omer Shavit, Hannah Aharon, Racheli Ron, Martin Oheim, Adi Salomon
Summary: Metamaterials and plasmonic structures made from aluminum have advantages such as low cost, long-term stability, and abundant resources. In this study, second harmonic generation (SHG) in the optical regime from triangular hole arrays in thin aluminum films was detected. The results showed intense nonlinear responses, year-long stability, and superior performances compared to gold. The high spatio-temporal resolution imaging using a non-linear single-spinning disk microscope has important applications in studying chemical transformations and aging processes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jeongwon Kim, Sungwoo Lee, Jiwoong Son, Jieun Kim, Hajir Hilal, Minsun Park, Insub Jung, Jwa-Min Nam, Sungho Park
Summary: Rational design of plasmonic colloidal assemblies via bottom-up synthesis is challenging but can demonstrate unprecedented optical properties that are strongly related to the shape and spatial arrangement of the assembly. In this study, plasmonic cyclic Au nanosphere hexamers (PCHs) were successfully synthesized and showed excellent performance in single-particle surface-enhanced Raman scattering signals.
Article
Chemistry, Multidisciplinary
Xiaofei Xiao, Raymond Gillibert, Antonino Foti, Pierre-Eugene Coulon, Christian Ulysse, Tadzio Levato, Stefan A. . Maier, Vincenzo Giannini, Pietro Giuseppe Gucciardi, Giancarlo Rizza
Summary: Surface-enhanced Raman optical activity (SEROA) has been extensively studied for its ability to directly probe the stereochemistry and molecular structure. This study presents a strategy for achieving a similar effect by coupling optically inactive molecules with the chiral plasmonic response of metasurfaces, resulting in a surface-enhanced Raman polarization rotation effect. This technique extends the potential of Raman optical activity to inactive molecules and enhances the sensitivity performances of surface-enhanced Raman spectroscopy, without the heating issue present in traditional plasmonic-enhanced ROA techniques.
Article
Chemistry, Multidisciplinary
Iolanda Di Bernardo, Joan Ripoll-Sau, Jose Angel Silva-Guillen, Fabian Calleja, Cosme G. Ayani, Rodolfo Miranda, Enric Canadell, Manuela Garnica, Amadeo L. Vazquez L. de Parga
Summary: This study uses scanning tunneling microscopy (STM) to investigate MBE-grown monolayer (ML) TaTe2, and reports the first observation of the coexistence of 1H polymorphic phase and 1T phase, with their relative coverage controlled by adjusting synthesis parameters. Several superperiodic structures compatible with CDWs are observed on the 1T phase. The study provides theoretical insight into the stability of different phases, determined by the balance of Te-Ta and Te-Te interactions.
Article
Chemistry, Multidisciplinary
Viliam Vano, Somesh Chandra Ganguli, Mohammad Amini, Linghao Yan, Maryam Khosravian, Guangze Chen, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth
Summary: Unconventional superconductors, particularly nodal superconductors, have been a focus in modern quantum materials research. This study demonstrates the existence of nodal superconductivity in pristine monolayer 1H-TaS2 using low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS) experiments. It is also found that non-magnetic disorder can drive the nodal state to a conventional gapped s-wave state, and many-body excitations emerge near the gap edge, indicating a potential unconventional pairing mechanism.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Thanh Hai Phan, Karla Banjac, Fernando P. Cometto, Federico Dattila, Rodrigo Garcia-Muelas, Stefan J. Raaijman, Chunmiao Ye, Marc T. M. Koper, Nuria Lopez, Magali Lingenfelder
Summary: Research has shown that Cu surfaces can reconstruct into Cu nanocuboids during the electroreduction of CO2, with the size of these structures being controllable by the applied potential and synthesis time. This finding presents a novel strategy for enhancing the long-term stability of Cu-based catalysts.
Article
Chemistry, Multidisciplinary
Miao Zhang, Martina Lihter, Tzu-Heng Chen, Michal Macha, Archith Rayabharam, Karla Banjac, Yanfei Zhao, Zhenyu Wang, Jing Zhang, Jean Comtet, Narayana R. Aluru, Magali Lingenfelder, Andras Kis, Aleksandra Radenovic
Summary: Transition metal dichalcogenides (TMDs) are a class of exciting semiconducting two-dimensional (2D) materials, where defects and their molecular interactions with the environment can significantly impact their properties. In this study, a new mapping method was demonstrated to locate sulfur-deficient defects in 2D-TMDs in aqueous solutions using fluorescence labeling with thiol chemistry. This approach allows precise localization of defects and control over Foster resonance energy transfer (FRET) process, revealing grain boundaries and line defects, as well as investigating binding kinetics under varying pH conditions.
Article
Chemistry, Physical
Silvia Carlotto, Javier D. Fuhr, Albano Cossaro, Alberto Verdini, Maurizio Casarin, Magali Lingenfelder, Julio E. Gayone, Luca Floreano, Hugo Ascolani
Summary: By utilizing Mn-Cu transmetalation, a long range ordered and commensurate metal-organic coordination network (MOCN) was formed on Cu(100), with Mn2+ ions stabilized in an artificial tetra-pyrrolic coordination. X-ray absorption spectroscopy confirmed that the Mn ions are in a high-spin state and the electronic structure of the Mn-TCNQ MOCN is similar to the corresponding unsupported MOCN.
APPLIED SURFACE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Wen Chen, Philippe Roelli, Aqeel Ahmed, Sachin Verlekar, Huatian Hu, Karla Banjac, Magali Lingenfelder, Tobias J. Kippenberg, Giulia Tagliabue, Christophe Galland
Summary: Metallic nanojunctions supporting localized plasmon resonances and enhancing light matter interactions have poorly understood dynamical phenomena. This study reports intrinsic photoluminescence blinking from plasmonic nanojunctions, caused by light-induced atomic scale restructuring of the metal.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Galan Moody, Volker J. Sorger, Daniel J. Blumenthal, Paul W. Juodawlkis, William Loh, Cheryl Sorace-Agaskar, Alex E. Jones, Krishna C. Balram, Jonathan C. F. Matthews, Anthony Laing, Marcelo Davanco, Lin Chang, John E. Bowers, Niels Quack, Christophe Galland, Igor Aharonovich, Martin A. Wolff, Carsten Schuck, Neil Sinclair, Marko Loncar, Tin Komljenovic, David Weld, Shayan Mookherjea, Sonia Buckley, Marina Radulaski, Stephan Reitzenstein, Benjamin Pingault, Bartholomeus Machielse, Debsuvra Mukhopadhyay, Alexey Akimov, Aleksei Zheltikov, Girish S. Agarwal, Kartik Srinivasan, Juanjuan Lu, Hong X. Tang, Wentao Jiang, Timothy P. McKenna, Amir H. Safavi-Naeini, Stephan Steinhauer, Ali W. Elshaari, Val Zwiller, Paul S. Davids, Nicholas Martinez, Michael Gehl, John Chiaverini, Karan K. Mehta, Jacquiline Romero, Navin B. Lingaraju, Andrew M. Weiner, Daniel Peace, Robert Cernansky, Mirko Lobino, Eleni Diamanti, Luis Trigo Vidarte, Ryan M. Camacho
Summary: Integrated photonics is crucial for the large-scale integration of quantum systems, enabling programmable quantum information processing, chip-to-chip networking, hybrid quantum system integration, and high-speed communications.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Quantum Science & Technology
Nicolas Schwaller, Valeria Vento, Christophe Galland
Summary: This study reports the experimental nondemolition measurement of coherence, predictability, and concurrence on a system of two qubits. The results show that the IonQ quantum computer provides constant state fidelity through the nondemolition process, outperforming IBM Q systems.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Chemistry, Physical
Zsuzsanna Koczor-Benda, Philippe Roelli, Christophe Galland, Edina Rosta
Summary: Molecular Vibration Explorer is a freely accessible online database and interactive tool for exploring vibrational spectra and light-vibration coupling strengths of thiolated molecules. Users can simultaneously investigate multiple spectroscopic parameters and customize plotting of corresponding spectra.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Multidisciplinary Sciences
Yunchang Liang, Karla Banjac, Kevin Martin, Nicolas Zigon, Seunghwa Lee, Nicolas Vanthuyne, Felipe Andres Garces-Pineda, Jose R. Galan-Mascaros, Xile Hu, Narcis Avarvari, Magali Lingenfelder
Summary: This study utilizes chiral molecules to control spin polarization in oxygen evolution electrocatalysts, resulting in increased catalytic activity. Functionalization with chiral molecules allows for surpassing the limits of catalytic activity, providing new insights for optimizing catalyst performance.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Yunchang Liang, Martina Lihter, Magali Lingenfelder
Summary: This review summarizes the latest studies on using molecule-induced electron spin polarization to enhance catalytic performance. It focuses on reactions essential to the hydrogen economy and discusses the feasibility and limitations of this effect. The research finds that controlling electron spin polarization at the catalyst's surface can significantly improve reaction activity and product selectivity.
ISRAEL JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
M. Victoria Bracamonte, Alen Vizintin, Gregor Kapun, Fernando Cometto, Jan Bitenc, Anna Randon-Vitanova, Miran Gaberscek, Robert Dominko
Summary: Research has found that the resistance of the interfacial layer in a rechargeable magnesium sulfur battery decreases in the presence of polysulfides, due to the joint corrosion of chlorides and sulfides. These findings provide new insights for addressing the issues of over-potential and fast capacity fading in magnesium sulfur batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Emiliano N. Primo, Franco Eroles, Maria del Carmen Rojas, Fernando Cometto, Ezequiel Leiva, Daniel E. Barraco, Guillermina L. Luque
Summary: The study investigates the impact of different aqueous based binders, prepared in basic and acidic medium, on the electrochemical performance of silicon nanoparticle-based anodes. Sodium alginate, polyacrylic acid, and sodium carboxymethylcellulose at different pHs were compared with the standard PVDF binder. Thermogravimetric analysis, rheological characterization, SEM, and XPS studies were conducted to analyze the interactions and evaluate the impact of viscosity and different functional groups on the electrochemical performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Energy & Fuels
Sofia Raviolo, Maria Victoria Bracamonte, Cecilia Andrea Calderon, Fernando Pablo Cometto, Guillermina Leticia Luque
Summary: In order to meet the energy transition, the demand for efficient energy storage devices has increased. It is equally important to produce these devices with minimal environmental impact. Therefore, the use of waste materials and low-polluting methods has become a strategic priority. In this study, brewers' spent grains were used to produce anodic electrodes for lithium-ion batteries. The synthesis process involved two low-temperature pyrolysis steps without any chemical treatment, reducing energy consumption and waste generation. The resulting biocarbon-based electrodes, decorated with silica nanoparticles, exhibited a capacity of 455 mAh g(-1) after 100 cycles, surpassing the standard anode material commonly used in commercial LIBs.
Article
Computer Science, Information Systems
Fabio Garzetti, Nicola Lusardi, Enrico Ronconi, Andrea Costa, Santiago Tarrago Velez, Christophe Galland, Angelo Geraci
Summary: Counting and measuring the arrival time of single photons is crucial for imaging and quantum applications. The current method using SNSPDs is not suitable for measuring multiple channels simultaneously. This study focuses on high-performance measurement of photon arrival time and correlation using SNSPDs and a 16-channel FPGA-based Time-to-Digital Converter.
