Article
Engineering, Electrical & Electronic
Ling-Jun Yang, Sheng Sun, Wei E. Sha, Zhixiang Huang, Jun Hu
Summary: This article presents an efficient synthesis method based on donut-shaped orbital angular momentum (OAM) metasurfaces for generating vortex beams. It allows the synthesis of vortex beams with arbitrary combinations of OAM modes and energy distributions, while avoiding undesired phase singularities in conventional OAM metasurfaces.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Multidisciplinary
D. Jonker, Z. Jafari, J. P. Winczewski, C. Eyovge, J. W. Berenschot, N. R. Tas, J. G. E. Gardeniers, I. De Leon, A. Susarrey-Arce
Summary: A new fabrication method for three-dimensional plasmonic structures, utilizing subtractive hybrid lithography, was introduced to produce large areas of Au-HNPs with nanoscale dimensions. The controlled fabrication process resulted in Au-HNPs with excellent optical responses, showing potential for applications in plasmonic sensors and spectroscopy.
NANOSCALE ADVANCES
(2021)
Article
Optics
Yunfeng Jiang, Wenlei Yu, Kehao Zeng
Summary: Arbitrary shaped abruptly autofocusing beam (AAB) with initial launch angle modulation is proposed and demonstrated in this paper. Usually, arbitrary shaped Airy beams constructed by substituting various shape functions into circular model lack abruptly autofocusing properties. The modulation of initial launch angles is necessary for these beams to regain abruptly autofocusing properties. The rectangle, star, and ellipse shaped AAB are mainly investigated in this paper, and other shaped AAB can be constructed using a similar method.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
B. Abasahl, C. Santschi, T. Raziman, O. J. F. Martin
Summary: The paper provides a detailed overview of nanofabrication techniques for plasmonics, focusing on two different approaches for the fabrication of metallic nanostructures based on e-beam lithography. Ion beam etching produces smaller and more regular features, while the lift-off process can result in slightly fuzzy nanoclusters on the substrate. Both techniques exhibit spectral differences in scattering cross sections for structures supporting complex resonances, guiding researchers to choose the best suited approach for a given application.
Article
Chemistry, Physical
Shilin Mu, Hongxu Chen, Chenyu Shi, Junhu Zhang, Bai Yang
Summary: Gold nanoring arrays with tunable plasmonic resonances can be prepared using colloidal lithography, allowing for flexible control over the dimensions of the nanorings. The plasmonic resonance spectra of the nanoring arrays can be obtained using Fourier transform near-infrared (FT-NIR) absorption spectroscopy. The prepared gold nanoring arrays exhibit a strong MR or IR plasmonic resonance which can be tuned by varying the nanoring dimensions, with potential applications in surface-enhanced spectroscopy or plasmonic sensing.
Article
Chemistry, Multidisciplinary
Jiaxu Huang, Kang Xu, Jin Hu, Dandan Yuan, Jun Li, Jingyu Qiao, Shaolin Xu
Summary: This paper proposes a self-aligned lithography technique that utilizes laser interference to create long-range ordered 2D nanostructures. The technique offers a high degree of controllability and can be applied to different materials for nanopatterning.
Article
Physics, Multidisciplinary
Shinki, Shreya Jain, Subhendu Sarkarb
Summary: This study systematically explores the role of thickness of metallic plasmonic layer in controlling SERS behavior. It is found that a 50nm-thick film on a surface with dense and small pyramids has a significantly high SERS contribution.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Chemistry, Multidisciplinary
Guoxu Yu, Yuan Ma, Xuan Li, Bowen Yu, Xinping Zhang, Xuanhe Zhang, Yiqing Chen, Zhenwei Liang, Zuobo Pang, Ding Weng, Lei Chen, Jiadao Wang
Summary: Micro/nanospherical lens photolithography (SLPL) is an efficient and precise method for micro/nanofabrication, offering advantages in cost-effectiveness and implementation. However, it currently mostly produces simple pattern shapes and lacks theoretical analysis on other possible shapes. By applying Mie scattering theory, we successfully address this limitation and propose methods to predict and obtain different patterns.
Article
Chemistry, Multidisciplinary
Ruifeng Zhu, Gabriela Figueroa-Miranda, Lei Zhou, Ziheng Hu, Bohdan Lenyk, Sven Ingebrandt, Andreas Offenhaeusser, Dirk Mayer
Summary: A dual-signal protocol was developed, combining electrochemical and optical detection methods using gold nanopit arrays, to improve aptamer-based biosensors. The non-fully penetrating AuNpA showed better plasmonic properties and enlarged the electrochemical active surface area compared to fully penetrating structures. The simultaneous use of electrochemical and optical transducers led to different detection limits, dynamic ranges, and sensitivities, providing new opportunities for disease diagnosis and point-of-care testing.
Article
Engineering, Multidisciplinary
Mahdi Kordi, Seyed Mohammad Reza Vaziri, Fahimeh Armin, Mojtaba Joodaki
Summary: This article introduces the use of 1D Fourier series expansion technique in interference lithography to create arbitrary patterns and proposes an inequality to find the required electric field intensity. By intelligently selecting parameters, the system performance can be greatly improved, ensuring subwavelength resolutions.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(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
Chemistry, Multidisciplinary
Ediz Kaan Herkert, Domenica Romina Bermeo Alvaro, Martina Recchia, Wolfgang Langbein, Paola Borri, Maria F. Garcia-Parajo
Summary: Biosensing applications often require single-molecule sensitivity in the presence of strong background signals. Plasmonic nanoantennas can confine and enhance light in volumes far below the diffraction limit, making them suitable for these tasks. Hybrid AiB platforms made of both gold and aluminum promise superior performance by providing better background screening and additional enhancements.
Article
Multidisciplinary Sciences
Rahmat Hidayat, Jalu Setiya Pradana, Alvin Fariz, Susi Komalasari, Siti Chalimah, Herman Bahar
Summary: Rectangular wave-shaped surface-relief plasmonic gratings (RSR-PGs) were fabricated using a nanoimprint photocuring lithography technique and metallization with gold nanolayer. Reflectance spectral dip was observed in the visible light region when a one-dimensional plasmonic grating with a periodicity of approximately 700 nm was formed. The dip was associated with surface plasmon resonance (SPR) wave excitation and was consistent with the simulation results using the rigorous coupled wave analysis (RCWA) method. The RSR-PGs exhibited richer plasmon characteristics compared to sine wave-shaped plasmonic gratings.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
Jitendra Kumar, Sarang Ingole
Summary: Vertical silicon nano-pillars have been fabricated inside cylindrical trenches using deep reactive ion etching, with alumina discs used as a hard mask. This platform can be extended for realizing microfluidic channels containing silicon nanowires for various applications, including chemical sensing.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Multidisciplinary Sciences
Junyu Ge, Bin Ding, Shuai Hou, Manlin Luo, Donguk Nam, Hongwei Duan, Huajian Gao, Yee Cheong Lam, Hong Li
Summary: The authors have developed a room-temperature ultrasonic nanoimprinting technique, named nanojackhammer, which addresses the challenges faced by nanoimprinting in imprinting hard materials at low or room temperature and in fabricating complex nanostructures rapidly by capitalizing on the concentration of ultrasonic energy flow at nanoscale.
NATURE COMMUNICATIONS
(2021)
Editorial Material
Biochemical Research Methods
Antje J. Baeumner, Guenter Gauglitz, Jiri Homola
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Tomas Springer, Erika Hemmerova, Giusy Finocchiaro, Zdenka Kristofikova, Martin Vyhnalek, Jiri Homola
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Biochemistry & Molecular Biology
Erika Hemmerova, Tomas Springer, Zdenka Kristofikova, Jiri Homola
Article
Biochemistry & Molecular Biology
Erika Hemmerova, Tomas Springer, Zdenka Kristofikova, Jiri Homola
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Chemistry, Physical
Milan Vala, Lukasz Bujak, Antonio Garcia Marin, Kristyna Holanova, Verena Henrichs, Marcus Braun, Zdenek Lansky, Marek Piliarik
Summary: Research reveals that microtubule disassembly is a discrete process, suggesting a stochastic mechanism of switching from disassembly to assembly phase.
Article
Physics, Applied
Milan Vala, David Palounek, Hadrien M. L. Robert, Marek Piliarik
Summary: This study quantifies the scattering anisotropy of single unlabeled microtubules with high precision using polarization-sensitive microscopy. The research explains the structural origin of microtubule anisotropy and monitors the impact of tau protein binding on microtubules.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Hana Sipova-Jungova, Ludmila Jurgova, Erika Hemmerova, Jiri Homola
Summary: Functional materials with organic coatings on inorganic substrates are considered potential platforms for various applications, leading to the investigation of their interactions with the micro-environment becoming a key research direction in surface science. This study focused on the interactions of Tris buffer with self-assembled monolayers (SAMs) of alkanethiols and short DNAs using a surface plasmon resonance (SPR) biosensor, showing that the interaction is a complex multiphasic process. The study also revealed how the interaction of Tris with immobilized DNA molecules can affect the determination of surface concentrations and hybridization efficiencies.
APPLIED SURFACE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Hadrien M. L. Robert, Kristyna Holanova, Lukasz Bujak, Milan Vala, Verena Henrichs, Zdenek Lansky, Marek Piliarik
Summary: The study introduces a high-speed photothermal spatial light modulator capable of generating a step-like wavefront change without diffraction artifacts, used for quantitative phase imaging to capture nanometer-scale 3D displacements.
NATURE COMMUNICATIONS
(2021)
Article
Biophysics
Tomas Springer, Zdenek Krejcik, Jiri Homola
Summary: A novel and extremely sensitive label-free optical biosensor-based assay for the detection of miRNAs has been proposed, which enhances specific sensor response while suppressing non-specific binding interference. The assay has been successfully applied to detect miRNAs related to myelodysplastic syndromes in blood plasma, achieving a low detection limit and enabling multiplexed miRNA detection.
BIOSENSORS & BIOELECTRONICS
(2021)
Editorial Material
Biochemical Research Methods
Milan Vala, Marek Piliarik
Review
Nanoscience & Nanotechnology
Hatice Altug, Sang-Hyun Oh, Stefan A. Maier, Jiri Homola
Summary: This Review presents the progresses in label-free nanophotonic biosensors based on photonic or dielectric surfaces and metasurfaces, and discusses their challenges and benefits in the fields of public health, well-being, and biosafety. Nanophotonic devices can control light and enhance light-matter interactions at subwavelength scales, offering exciting prospects for biosensing applications.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Analytical
Jiri Slaby, Marketa Bockova, Jiri Homola
Summary: A new optical biosensor based on gold nanostripes array excited surface plasmons is presented, with theoretical analysis showing its improved detection sensitivity compared to conventional surface plasmon resonance biosensors. Experimental validation of the theoretical model demonstrates high refractive index sensitivity and resolution of the nanoplasmonic sensor. Additionally, the biosensor successfully detects microRNA biomarkers at low concentrations, showcasing its potential for sensitive and specific biomolecular detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biochemistry & Molecular Biology
Anna Ligasova, Ivan Rosenberg, Marketa Bockova, Jiri Homola, Karel Koberna
Summary: This study introduces a novel approach for real-time measurement of uracil DNA glycosylase activity by immobilizing selected oligonucleotides on magnetic nanoparticles and utilizing Forster resonance energy transfer. The results demonstrate that this method provides more reliable data than using free oligonucleotides, and offers the possibility to investigate the relationship between uracil DNA glycosylase activity and the arrangement of oligonucleotide probes. Additionally, introducing a nick into oligonucleotides containing the target base (uracil) significantly decreases the activity of both bacterial glycosylase and glycosylases naturally present in nuclear lysates.
Article
Biophysics
Jiri Slaby, Jiri Homola
Summary: In this study, we analyze the performance of label-free optical biosensors in detecting analyte-induced refractive index changes. We propose an analytical model that relates the refractive index resolution to the parameters of the optical platform. Our findings demonstrate that the widely used figure of merit (FOM) is not suitable for guiding the design or predicting the performance of label-free optical biosensors. Therefore, we propose an extended definition of FOM to address its limitations. The validity of our approach is confirmed through numerical simulations and experiments, and we show that the analytical model not only predicts the performance of biosensors but also provides strategies for achieving optimal performance.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Polymer Science
Yu-Min Wang, Anna Kalosi, Yuriy Halahovets, Iryna Romanenko, Jiri Slaby, Jiri Homola, Jan Svoboda, Andres de los Santos Pereira, Ognen Pop-Georgievski
Summary: This study compared the anti-fouling properties of poly(HPMA) brushes prepared by chemisorption and surface-initiated polymerization methods, finding that the latter exhibited better anti-fouling performance due to higher grafting density.
