Article
Chemistry, Multidisciplinary
Lufang Liu, Alexey Krasavin, Junsheng Zheng, Yuanbiao Tong, Pan Wang, Xiaofei Wu, Bert Hecht, Chenxinyu Pan, Jialin Li, Linjun Li, Xin Guo, Anatoly Zayats, Limin Tong
Summary: Using chemically synthesized gold microflakes as a mirror, low-loss nanocavities with significantly improved optical quality factor and scattering intensity can be constructed. These nanocavities can be integrated with fiber optics, opening up new opportunities for practical applications.
Article
Chemistry, Physical
Matthew Faria, Stuart T. Johnston, Andrew J. Mitchell, Edmund Crampin, Frank Caruso
Summary: Evaluating the potential of nanomaterials for biological applications involves investigating their interactions with cells and biological fluids, with the choice of appropriate metrics being crucial. Some commonly used metrics in bio-nano scientific literature have significant issues and may not deliver the intended insight.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shuang Zhou, Zhong Wang, Chenyu Dong, Jie Bian, Weihua Zhang
Summary: This study investigated the wavelength-dependent laser-induced dynamic annealing of single plasmonic nano-antennas using in situ white light spectroscopy. The experiment revealed unexpected back-and-forth motions of rapidly melted single nano-antennas under excitation with a 532 nm laser, while gradual opening of nanogaps was observed with a 405 nm laser. Theoretical analyses suggested that the complex dynamics were caused by multiphysical processes at the nanoscale induced by the laser.
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.
Review
Chemistry, Multidisciplinary
Xingda An, Shyamsunder Erramilli, Bjorn M. Reinhard
Summary: Bacterial, viral, and fungal infections pose serious threats to human health, necessitating the development of new antimicrobials. Plasmonic nano-antimicrobials with advantageous optical properties show promising applications in microbial inactivation and detection.
Article
Chemistry, Multidisciplinary
Hyunwoo Kim, Seunghyun Moon, Jongwoo Kim, Sang Hwan Nam, Dong Hwan Kim, Jeong Seop Lee, Kyoung-Ho Kim, Evan S. H. Kang, Kwang Jun Ahn, Taewan Kim, ChaeHo Shin, Yung Doug Suh
Summary: The study investigated photoluminescence enhancement from few-layer MoS2 transferred on Au nanostructure arrays with controlled localized surface plasmon resonance (LSPR) spectral positions. Two distinctive regimes in LSPR mode-dependent PL enhancement were revealed, with a maximum enhancement of around 40-fold at zero detuning and a modest enhancement of around 10-fold with red-shift detuned LSPR, attributed to LSPR-induced optical field enhancement and the Purcell effect, respectively.
Article
Chemistry, Multidisciplinary
Hao Tang, Guozheng Shao, Bruce J. Hinds
Summary: The study demonstrates a plasmonic flow reactor utilizing thin gold film at exits of monolithic anodized aluminum oxide membranes under LED illumination. By controlling residence time with flow rate and pore geometry, the system achieves high efficiency for peroxide activation and restricts reactions to single oxidation. The mechanism primarily involves hot electron generation from gold plasmonic response.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Kailin Ye, Tianqi Xu, Qize Zhong, Yuan Dong, Shaonan Zheng, Zhengji Xu, Ting Hu
Summary: In this study, a polarization-insensitive optical filter is demonstrated using polarization rotator-splitters and microring resonators on the silicon-on-insulator platform. The device shows identical optical transmission spectra for different polarization inputs, with a narrow bandwidth and high extinction ratio.
Article
Multidisciplinary Sciences
Hyo-Seung Park, Jongkil Park, Joon Young Kwak, Gyu-Weon Hwang, Doo-Seok Jeong, Kyeong-Seok Lee
Summary: A novel nano-plasmonic sensing platform based on a vertical conductive bridge was proposed, showing significant enhancement in optical properties through optimization of geometric parameters, which extends the application of surface-enhanced Raman scattering substrates.
SCIENTIFIC REPORTS
(2021)
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, Electrical & Electronic
Mohammad Reza Safaeian, Leila Yousefi
Summary: This paper proposes a new architecture for developing plasmonic bio-sensors, where sensing is achieved through optical beam steering. Numerical simulation results show that the designed structure has high sensitivity and sufficient output light intensity.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Shan Yan, Dong K. Dinh, Guojun Shang, Shan Wang, Wei Zhao, Xin Liu, Richard Robinson, Jack P. Lombardi, Ning He, Susan Lu, Mark Poliks, Benjamin S. Hsiao, Ivan Gitsov, Chuan-Jian Zhong
Summary: This study demonstrates the creation of chemically responsive electro-functionality in nonconductive, hydrophobic, and free-contacted textile or fibrous network materials by embedding size-tunable gold nanoparticles and structurally sensitive dendrons as crosslinkers in an electrospun polymeric fibrous substrate. The resulting fibrous structure shows high sensitivity to molecular interactions and exhibits chemiresistive responses to vaporous alcohol molecules with different chain lengths and isomers. This approach utilizes the multifunctional tunability of the nano-filaments in a sensor array format, providing potential applications in breath and sweat sensing as well as environmental monitoring of air quality.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Seyed M. Sadeghi, Dustin T. Roberts, Rithvik R. Gutha, Steven Allen, Christina Sharp
Summary: In this study, in-plane light scattering and collective excitations in plasmonic metasurfaces consisting of Au V-shaped nanoantennas were investigated experimentally and numerically. It was found that the metasurfaces can support two types of supercells, with different coupling processes and resonances, depending on the polarization of the incident light.
Article
Nanoscience & Nanotechnology
Hsiao-Fen Han, Hung-Chi Yen, Hsiu-Chuan Wu, Hsin-Yuan Tan, Wei Xu, Hang-Shiang Jiang, Ping-Jui Tsai, Kun Qian, Yi-Chun Wu, Chia-Chun Chen
Summary: More than 55 million people worldwide live with dementia, with nearly 10 million new cases annually, mainly caused by Alzheimer's disease. Early detection of AD has been challenging due to limited brain imaging facilities and the invasive nature of cerebrospinal fluid assays. A rapid, specific, and ultrasensitive immunoassay using pGOLD chips has shown potential for detection of AD biomarkers at subpicogram per milliliter levels, offering great application potential for early AD detection using blood samples.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Ali Asghar Khorami, Behdad Barahimi, Sare Vatani, Athar Sadat Javanmard
Summary: We utilize graphene nano-taper plasmons to create tunable plasmonic tweezers for the manipulation of neuroblastoma extracellular vesicles. By engineering the dimensions and Fermi energy of the nano-taper, we can generate the desired near-field gradient force for trapping under low-intensity illumination. The designed system can efficiently trap neuroblastoma extracellular vesicles with a diameter of 88 nm.
Article
Engineering, Manufacturing
Marcello Valori, Lara Rebaioli, Valeria Marrocco, Francesco Modica, Francesco Bonelli, Giuseppe Pascazio, Vincenza Portosi, Francesco Prudenzano, Antonella Fasano, Vito Lampignano, Irene Fassi
Summary: This paper addresses the manufacturing challenges and technological solutions for prototyping microwave ablation (MWA) probes. A case study of a 14G MWA probe prototype, working at a frequency of 2.45GHz, is presented to demonstrate the design efforts and the use of rapid prototyping technologies. The experimental results show that the prototype exhibits satisfactory performance and structural reliability.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Engineering, Multidisciplinary
Roberto Marani, Daniel U. Campos-Delgado
Summary: This paper presents a method for automatically analyzing surface thermograms to classify buried defects in composite materials. The time-dependent thermal contrasts captured from the sample surface are linearly unmixed to produce results independent of the defect shapes. The method shows promising results in defect classification without the need for inspections with different source excitations.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
G. Gelao, R. Marani, A. G. Perri
Summary: In this paper, we propose a method to study the relationship between the performance of a CNTFET amplifier and the parameters of a CNT. We analyze the effects on a linear common source amplifier using a N type CNTFET with a resistive gate polarization. We present the analysis for a zig-zag CNT and show that F-3dB has an inverse dependence on the length and decreases at higher structural indices.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Laura Romeo, Roberto Marani, Tiziana D'Orazio, Grazia Cicirelli
Summary: In recent years, there has been a significant increase in the number of older people living alone. Innovative vision systems can remotely assess people's mobility, contributing to healthy and happy aging. However, the assessment of older people's mobility is not widely practiced in clinics, and the lack of data often limits the analysis to binary classification rather than comprehensive medical protocols. This study uses real videos to automatically categorize the mobility of elderly people, emulating the evaluation process of expert physiotherapists. Results show that the proposed Conv-BiLSTM classifier achieves the best accuracy, ranging from 88.12% to 90%, outperforming shallow learning classifiers in evaluating people's mobility.
Article
Optics
Domenico de Ceglia, Marco Gandolfi, Maria Antonietta Vincenti, Andrea Tognazzi, Paolo Franceschini, Alfonso C. Cino, Gina Ambrosio, Camilla Baratto, Bohan Li, Rocio Camacho-Morales, Dragmoir N. Neshev, Costantino De Angelis
Summary: We investigate transient, photo-thermally induced meta-surface effects in a planar thin-film multilayer based on a phase-transition material. Illumination with obliquely incident, phase-coherent pulsed pumps induces a reversible temperature pattern in the phase-transition layer, leading to a transient Fano-like spectral feature. The study suggests new opportunities for dynamic control of the quality factor in photonic resonances and for light modulation and switching.
Review
Materials Science, Multidisciplinary
R. Marani, A. G. Perri
Summary: In this review, we implemented a semi-empirical compact model for CNTFETs in SPICE using ABM library and in Verilog-A language of ADS, highlighting the differences between the two software. We reviewed the design of analog circuits (common source amplifier and phase-shift oscillator) and digital circuits (NOT and NAND gates) in both SPICE and Verilog-A, observing comparable results in dynamic simulations and same results in static simulations. Additionally, we found that Verilog-A has shorter simulation run time and is more concise and clear than schemes using ABM blocks in SPICE.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Review
Materials Science, Multidisciplinary
R. Marani, A. G. Perri
Summary: This review article examines various CNTFET-based circuit designs, proposed and critically evaluated by the authors. The performance of these circuits in both CNTFET and CMOS technology is compared for some designs. A compact, semi-empirical model proposed by the authors is used for the CNTFET model, while the BSIM4 model from the ADS library is used for the MOSFET model. Additionally, the authors compare their results with those obtained using the Stanford model in some design examples. All simulations are performed using the Advanced Design System (ADS) software, which is compatible with the Verilog-A programming language.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Applied
Boqing Liu, Tanju Yildirim, Elena Blundo, Domenico de Ceglia, Ahmed Raza Khan, Zongyou Yin, Hieu T. Nguyen, Giorgio Pettinari, Marco Felici, Antonio Polimeni, Yuerui Lu
Summary: In this study, large pressurized monolayer TMD domes were fabricated using proton irradiation, and their SHG performance was comprehensively investigated. The results showed that the intensity of SHG was effectively enhanced by around two orders of magnitude at room temperature. This giant enhancement was attributed to the distinct separation distance induced by capped pressurized gas and the hemi-spherical morphology, which enabled constructive optical interference. Moreover, the unique divergent strain field in TMD domes promoted the first experimental study on the anisotropic nonlinear optical behavior based on biaxial strain conditions.
APPLIED PHYSICS REVIEWS
(2023)
Article
Optics
S. Mukhopadhyay, L. Rodriguez-Sune, C. Cojocaru, M. A. Vincenti, K. Hallman, G. Leo, M. Belchovski, D. de Ceglia, M. Scalora, J. Trull
Summary: We report experimental observations and numerical simulations of second and third harmonic generation from a gold nanograting, which exhibits a plasmonic resonance in the near infrared. The resonance is tunable, with a spectral position that depends on the angle of incidence. The enhancement of nonlinear optical processes produced by the field localization in the nanograting when compared with a flat gold mirror manifests itself dramatically from the ultraviolet to the visible range, suggesting potential applications in nonlinear optics of metals at the nanoscale.
Article
Materials Science, Multidisciplinary
Luca Fagiani, Luca Bolzonello, Johann Osmond, Domenico de Ceglia, Niek van Hulst, Monica Bollani, Maria Antonietta Vincenti
Summary: This study presents a silicon-based nanostructure that can control light polarization with high precision and compact size. By leveraging the properties of quasi-bound states in the continuum, the proposed meta-polarizer converts arbitrarily polarized incoming light into linearly polarized light without the use of local phase tuning mechanisms. The experimental results demonstrate its effectiveness in compensating unwanted birefringence in optical fibers and controlling polarization in complex media environments.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Cristina Brambilla, Roberto Marani, Laura Romeo, Matteo Lavit Nicora, Fabio A. Storm, Gianluigi Reni, Matteo Malosio, Tiziana D'Orazio, Alessandro Scano
Summary: This study investigates the performance of the Microsoft Azure Kinect sensor in human motion tracking and compares it with a Vicon marker-based system. The study found that the frontal camera position is the most reliable, lighting conditions have minimal effects on tracking accuracy, and lower limbs occlusion worsens the accuracy of upper limb tracking. Therefore, the Azure Kinect shows feasibility in biomechanical monitoring of human motion in various fields.
Article
Engineering, Electrical & Electronic
C. Baratto, M. Gandolfi, A. Tognazzi, P. Franceschini, G. Ambrosio, B. Li, R. Camacho Morales, D. de Ceglia, A. C. Cino, D. N. Neshev, C. De Angelis
Summary: An infrared optical limiting sensor has been developed for laser protection. The sensor uses metallic and dielectric photonic resonators with phase-change materials, optimized deposition by RF magnetron sputtering, and silver placement between VO2 and the substrate to improve performance. The optimum thickness for VO2 and silver films has been calculated, and characterization and resistance measurements have been performed. The sensor exhibits a transmittance drop of 70% when exposed to a laser pulse excitation.
IEEE SENSORS LETTERS
(2023)
Article
Computer Science, Information Systems
Mohammad Ali Shameli, Antonio-D Capobianco, Luca Schenato, Marco Santagiustina, Domenico De Ceglia
Summary: In this paper, a novel reconfigurable metasurface architecture is proposed and evaluated for wavefront control in millimeter-wave wireless systems. The metasurface, made of engineered silicon bricks covered with a thin film of vanadium dioxide, demonstrates anomalous reflection with 93% efficiency and 15% relative bandwidth at 60 GHz. By applying a thermal stimulus, the metasurface undergoes a phase transition in vanadium dioxide, leading to specular reflection. This device allows dynamic control of millimeter waves, making it suitable for various applications in 5G and 6G systems.
Article
Chemistry, Multidisciplinary
Giovanna Calo, Gaetano Bellanca, Franco Fuschini, Marina Barbiroli, Velio Tralli, Vincenzo Petruzzelli
Summary: In this study, an integrated dielectric Vivaldi antenna is presented, which exhibits the same gain performance for both TE and TM input polarizations. Point-to-point on-chip communication links between two Vivaldi antennas are analyzed, and the effect of wave polarization on the link performances is numerically studied. The results show that TM polarization, with suitable cladding layer thickness and refractive index, is affected by lower propagation losses.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Information Systems
Mohammad Ali Shameli, Mirko Magarotto, Antonio-D Capobianco, Luca Schenato, Marco Santagiustina, Domenico De Ceglia
Summary: A novel architecture of reconfigurable, flat metalens with electrically tunable focal length is proposed for wireless communication systems operating at millimeter wave frequencies. The metalens is made of reflective silicon bricks distributed on a grounded multilayer with phase-transition material films, allowing for different focal lengths. Numerical investigation shows that the metalens can reversibly tune focal length at specific distances and remains tunable within a certain frequency range. This has significant importance for dynamically controlling the focal point of millimeter waves in wireless communications.
