Article
Chemistry, Multidisciplinary
Timothy J. J. Palinski, Bin Guan, Bronwyn H. H. Bradshaw-Hajek, Michael A. A. Lienhard, Craig Priest, Felix A. Miranda
Summary: This paper presents a colorimetric sensing system for rapid detection of gas-phase analytes from flowing micro-volume fluid samples. The sensor platform combines an analyte-responsive metal-insulator-metal (MIM) thin-film structure with a large area quartz micropillar array, allowing precise alignment and separation of optical and fluidic structures. The sensor's response time is reduced from minutes to seconds, making it suitable for portable/wearable devices. The platform shows potential for continuous, compact, and quantitative colorimetric analysis of volatile analytes in low-volume samples.
Article
Chemistry, Analytical
Adriano Colombelli, Daniela Lospinoso, Roberto Rella, Maria Grazia Manera
Summary: This paper presents an efficient and reproducible fabrication protocol for metal nanostructures with tunable plasmonic features using nanosphere lithography. The relationships between the geometric characteristics of different types of nanostructures and related optical phenomena are investigated, and optimized for their application as optical transducers in nanoplasmonic chemosensor platforms operating in the UV-VIS spectral range.
Article
Optics
I Vitoria, C. R. Zamarreno, A. Ozcariz, J. J. Imas, I. R. Matias
Summary: This study explores the lossy mode resonance (LMR) phenomenon in the short wave infrared region (SWIR) and medium wave infrared region (MWIR) using fluoride glass optical fiber. Devices fabricated with nanometric thin-film of titanium dioxide show extraordinary sensitivities to external refractive index (RI) variations, demonstrating great potential for detecting minute concentrations of gaseous or biological compounds in different media. The research also reveals the utilization of LMRs in these regions for the first time.
Article
Materials Science, Multidisciplinary
Abdul Rahim Ferhan, Youngkyu Hwang, Mohammed Shahrudin Bin Ibrahim, Shikhar Anand, Ahram Kim, Joshua A. Jackman, Nam-Joon Cho
Summary: This study presents the development of plasmonic gold nanorod arrays with ultrahigh surface sensitivity for detecting biomacromolecular interactions, demonstrating superior biosensing performance. By rationally tuning nanorod dimensions, the highest reported degree of surface sensitivity compared to various plasmonic nanostructures was achieved. The measurement capabilities developed in this study have broad applicability to a wide range of biosensing applications.
APPLIED MATERIALS TODAY
(2021)
Review
Optics
Siqi Zhang, Bo Han, Ya-nan Zhang, Yingxuan Liu, Wanlu Zheng, Yong Zhao
Summary: Fiber optic sensors based on surface plasmon resonance (SPR) have shown excellent performance in various fields such as biomedical, environmental monitoring, and public safety, providing a powerful platform for qualitative detection and quantitative analysis of molecular interactions. Multichannel fiber optic SPR sensors have become a core tool in parallel detection scenarios due to their ability to compensate for nonspecific binding and environmental fluctuations, and to enable multi-analyte determination. This review analyzes and compares the structure, excitation effect, sensing performance, advantages and disadvantages of different types of multichannel fiber optic SPR sensors. Despite some challenges, efforts in multidisciplinary research, including developing high-performance sensitive films and innovative micro-nano fabrication processes, will overcome these obstacles. Finally, the future development directions of multichannel fiber optic SPR sensors from principle, structure, and material aspects are discussed.
LASER & PHOTONICS REVIEWS
(2022)
Article
Polymer Science
Katalin Bukovinszky, Melinda Szaloki, Istvan Csarnovics, Attila Bonyar, Peter Petrik, Benjamin Kalas, Lajos Daroczi, Sandor Keki, Sandor Kokenyesi, Csaba Hegedus
Summary: The study investigated the surface plasmon resonance effect of gold nanoparticles on a photopolymer system and found that under specific conditions, it can significantly improve polymerization efficiency.
Article
Chemistry, Multidisciplinary
Youngkyu Hwang, Dong Jun Koo, Abdul Rahim Ferhan, Tun Naw Sut, Bo Kyeong Yoon, Nam-Joon Cho, Joshua A. Jackman
Summary: Gold nanorods are used for constructing surface-based nanoplasmonic biosensing platforms. Controlling the concentration of APTES during surface preparation affects density and sensitivity of the biosensing platform.
Article
Biophysics
Bo Kyeong Yoon, Hyeonjin Park, Vladimir P. Zhdanov, Joshua A. Jackman, Nam-Joon Cho
Summary: This study developed a real-time biosensing strategy to detect three-dimensional morphological changes in supported lipid bilayers on a plasmonic substrate. The concept was validated by triggering specific three-dimensional membrane morphological changes through the addition of antimicrobial fatty acids and other compounds. Different remodeling events were detected by distinct measurement signatures, which can be applicable to various biosensing techniques.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Abbas Hamouleh-Alipour, Ali Mir, Ali Farmani
Summary: The thermo-optic mechanism for plasmonics sensing of terahertz radiations in Graphene/SiO2 metasurface is investigated numerically and analytically at room temperature. A very compact footprint for nanosensor applications is proposed, with high sensitivity and figure of merit. The study also explores tunable optical properties of graphene at different temperatures and the relationship between temperature variation and structure performance.
IEEE SENSORS JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Pernilla Ekborg-Tanner, J. Magnus Rahm, Victor Rosendal, Maria Bancerek, Tuomas P. Rossi, Tomasz J. Antosiewicz, Paul Erhart
Summary: This study utilized a multiscale modeling approach to determine optimal conditions for optical hydrogen sensing using the Pd-Au-H system, and observed the pattern of optical sensitivity changing with hydrogen concentration at the single nanoparticle level. While alloy composition has limited impact, it strongly affects hydrogen uptake and thermodynamic sensitivity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Biochemical Research Methods
Youjun Zeng, Zhaogang Nie, Dongyun Kai, Jiajie Chen, Yonghong Shao, Weifu Kong, Zhengqiang Yuan, Ho-Pui Ho, Fangteng Zhang
Summary: This paper presents a novel WSPRi sensing system with a high anti-interference capability and low cost. By introducing devices such as an acousto-optic tunable filter and a halogen lamp, real-time recording of brine concentration and formation of the coffee ring effect were successfully achieved, and the performance of the biosensor was improved. The high anti-interference capability and accuracy of this system will greatly contribute to the exploration of biomolecule behaviors in biological and biochemistry studies.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Edwin J. Ortiz-Riano, Diana L. Mancera-Zapata, Martha Ulloa-Ramirez, Fernando Arce-Vega, Eden Morales-Narvaez
Summary: Macromolecular association is important in biomedical sciences. This study presents a real-time biosensing platform using graphene oxide-modified microwell plates and fluorophore-labeled proteins to determine protein-binding constants. The platform proves to be comparable and consistent with existing methods in determining protein kinetics constants.
ANALYTICAL CHEMISTRY
(2022)
Article
Optics
Md Mahbub Hossain, Muhammad Anisuzzaman Talukder
Summary: The proposed surface plasmon resonance glucose sensor utilizes a graphene monolayer with controllable optical properties achieved by applying a gate voltage, leading to significantly increased sensitivity and stability. The sensor shows reliable performance in detecting blood sugar levels within an acceptable error range despite temperature variations.
OPTICS COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
K. M. Mustafizur Rahman, M. Shah Alam, Rajib Ahmed, M. Asiful Islam
Summary: A highly sensitive hexagonal photonic crystal fiber (PCF) based surface plasmon resonance (SPR) refractive index (RI) sensor is proposed, with optimized design structure and parameters for optimal performance in various refractive index ranges.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
A. D. Suprun, L. V. Shmeleva
Summary: It is established that water temperature affects the wavelength of surface plasmon resonance in the prism-golden nano layer-water structure, which can be used to measure the temperature of the medium.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Chemistry, Multidisciplinary
Byron Llerena Zambrano, Csaba Forro, Erik Poloni, Robert Hennig, Pragash Sivananthaguru, Aline F. Renz, Andre R. Studart, Janos Voeroes
Summary: This research demonstrates the manipulation of nanowires using superparamagnetic iron oxide nanoparticles and vacuum filtration, resulting in different structures of oriented nanowires. The study also investigates the strain-dependent electrical properties of nanowires within composite materials.
Article
Chemistry, Physical
Akira Yasuhara, Takumi Sannomiya
Summary: Metallic nanoparticles, especially those alloyed with multiple metal elements, have been widely studied for their unique electrical, optical, and catalytic properties. Interfaces between different phases and grain boundaries play a significant role in determining the catalytic efficiency and chemical stability of the alloy nanoparticles. In this study, Au-Ag-Cu ternary alloy nanoparticles were synthesized and their atomically localized structures, particularly at the grain boundaries, were investigated. The findings provide insights into the interface structure of these nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
John Andersson, Justas Svirelis, Gustav Ferrand-Drake del Castillo, Takumi Sannomiya, Andreas Dahlin
Summary: This study demonstrates the use of 20 nm Pd and Pt films for quantitative SPR sensing of organic films, despite their high light absorption. The Pd sensors show similarities to 50 nm gold in sensitivity and field extension, while Pt sensors have a longer extension of the evanescent field but higher noise levels. The findings highlight the advantages of SPR for studying chemical modifications of important metals in various contexts.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Neurosciences
Jens Duru, Joeel Kuechler, Stephan J. Ihle, Csaba Forro, Aeneas Bernardi, Sophie Girardin, Julian Hengsteler, Stephen Wheeler, Janos Voeroes, Tobias Ruff
Summary: Bottom-up neuroscience addresses questions on neural information processing by engineering reproducible biological neural networks of defined network topology in vitro. By using high-density CMOS MEAs, it enables high spatiotemporal resolution for sub-cellular readout and stimulation, overcoming the limitations of currently used glass MEAs.
FRONTIERS IN NEUROSCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Dung Thi Vu, Nikolaos Matthaiakakis, Hikaru Saito, Takumi Sannomiya
Summary: In this study, the emission modes of single molybdenum disulfide nanoflakes were experimentally visualized using cathodoluminescence. Dielectric resonances were found to enhance the luminescence of the nanoflakes. The coupling of exciton and dielectric resonant modes was observed through theoretical simulations and experiments.
Article
Chemistry, Multidisciplinary
Jose C. Mateus, Sean Weaver, Dirk van Swaay, Aline F. Renz, Julian Hengsteler, Paulo Aguiar, Janos Voeroes
Summary: This research utilizes electron beam lithography and photolithography to create microstructures that control neuronal connectivity, and demonstrates the formation of functional synapses in vitro.
Article
Biophysics
Stephan J. Ihle, Sophie Girardin, Thomas Felder, Tobias Ruff, Julian Hengsteler, Jens Duru, Sean Weaver, Csaba Forro, Janos Voros
Summary: We present a paradigm to examine the behavior of multiple neuronal networks with controlled topology in vitro. Our approach enables simultaneous electrical stimulation and recording of neuronal activity from 60 independent networks over multiple weeks. We found that the network response pattern to a stimulus remains stable for at least 12 hours and continuous stimulation does not significantly change the stimulation-induced mean spiking frequency of a circuit. We also investigated the effect of stimulation amplitude and timing on the network response and demonstrated the capability of our setup to apply complex stimulation protocols.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Analytical
Lukas Schmidheini, Raphael F. Tiefenauer, Volker Gatterdam, Andreas Frutiger, Takumi Sannomiya, Morteza Aramesh
Summary: By combining nanodiamonds with gold nanoparticles through DNA hybridization, a hybrid system is created which allows for fluorescence emission in nanodiamonds induced by harmonic emission in gold nanoparticles. The stochastic emission fluctuations can be utilized for potential applications in super-resolution microscopy, making it significant for intracellular biosensing and bioimaging.
Article
Nanoscience & Nanotechnology
Akira Yasuhara, Masahiro Homma, Takumi Sannomiya
Summary: Metallic nanoparticles with localized surface plasmon resonance have suitable optical properties for various applications, and the phase-separated Janus nanoparticles can be formed at high temperatures to tune the optical properties and metastructures of the nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jean-Marc Von Mentlen, Jasper Clarysse, Annina Moser, Dhananjeya Kumaar, Olesya Yarema, Takumi Sannomiya, Maksym Yarema, Vanessa Wood
Summary: This article presents an easy method to reliably engineer thin Ga2O3 shells on Au nanoparticles. With the liquid-phase chemical oxidation of Au-Ga alloy nanoparticles, laminar and ultrathin Ga2O3 shells can be grown. The reaction process and Ga2O3 shell growth can be monitored using localized surface plasmon resonance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Dung Thi Vu, Nikolaos Matthaiakakis, Takumi Sannomiya
Summary: A significant enhancement of the A- and B-exciton emission in MoS2 flakes through coupling with plasmonic Au nano-pyramid arrays fabricated by a colloidal lithography technique is reported in this study. The local emission enhancement from the structure is experimentally mapped with a nanometer spatial resolution by cathodoluminescence (CL) technique. The strongly enhanced emission intensity within the MoS2-Au pyramids is achieved due to the localized surface plasmon resonance confined in nano-pyramids and its interaction with the periodicity-based resonance of the array structure. These results provide an approach to significantly improve the luminescence intensity of MoS2 through optical interaction with the local plasmonic field, which is promising for applications in optoelectronic devices and nanophotonics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Izzah Machfuudzoh, Tatsuki Hinamoto, F. Javier Garcia de Abajo, Hiroshi Sugimoto, Minoru Fujii, Takumi Sannomiya
Summary: This study fills the research gap in direct imaging of optical modes by demonstrating nanoscale optical-field visualization of self-interference of light extracted from excited modes through experimentally obtained photon maps that directly portray the field distributions of the excited eigenmodes. By selectively choosing specific modes using cathodoluminescence-based scanning transmission electron microscopy with angle-, polarization-, and wavelength-resolved capabilities, the internal field distributions of the whispering-gallery modes reveal the interference between multiple modes and the resulting complex patterns dependent on the detection angle and polarization. The direct visualization of internal fields enables a comprehensive understanding of WGMs and can provide insights for the design of nanophotonic applications.
Article
Biophysics
Jens Duru, Benedikt Maurer, Ciara Giles Doran, Robert Jelitto, Joel Kuchler, Stephan J. Ihle, Tobias Ruff, Robert John, Barbara Genocchi, Janos Voros
Summary: This article presents a bottom-up neuroscience approach using engineered biological neural networks to study neuronal activity. The researchers establish a platform with up to six independent networks formed by rat neurons on microelectrode arrays. They demonstrate that continuous application of a repetitive super-threshold stimulus generates a reproducible network response within a 15 ms post-stimulus window, which can be tracked with high spatiotemporal resolution across the entire network.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Microscopy
Yoshikazu Adachi, Naoki Yamamoto, Takumi Sannomiya
Summary: We developed a novel light optics system for a scanning transmission electron microscope (STEM) that accurately introduces a focused light at the electron beam irradiation position using a parabolic mirror. The position and focus of the light beam can be evaluated by imaging the angular distribution of the transmitted light. This system allows for investigating optical spectra in comparison with cathodoluminescence (CL) spectra at exactly the same location.
Article
Materials Science, Multidisciplinary
Tatsuro Yuge, Naoki Yamamoto, Takumi Sannomiya, Keiichirou Akiba
Summary: We propose a theoretical model for cathodoluminescence (CL) based on a master equation. The model describes the excitation of multiple emitters by an incoming electron and the decay of individual emitters. We investigate the second-order correlation function, g(2)(r), and derive exact and approximate formulas for different scenarios. Moreover, we discuss the radiation field state of CL and reveal the existence of a state resulting from a mixture of excited photon state and vacuum state, leading to superbunching.
