Article
Chemistry, Analytical
Juan Gomez-Cruz, Yazan Bdour, Kevin Stamplecoskie, Carlos Escobedo
Summary: In this study, a hybrid nanostructure with strong surface-enhanced Raman scattering (SERS) activity is introduced and investigated. The nanostructure combines metallic nanoparticles (MNPs) and flow-through nanohole arrays (NHAs) to achieve collective plasmonic resonance. Computational analysis is used to determine the optimal spatial configuration of the nanoparticles and nanoapertures, and to compare the performance of silver nanoparticles on silver and gold NHAs. The results show that the hybrid nanostructures enable the formation of strong SERS-active hotspots and plasmonic enhancement, making them compatible for SERS-based sensing applications.
Article
Nanoscience & Nanotechnology
Minh T. Pham, Hoang M. Luong, Huy T. Pham, Tyler Guin, Yiping Zhao, George K. Larsen, Tho D. Nguyen
Summary: With hydrogen gas becoming increasingly critical as a carbon-free energy carrier, the demand for reliable hydrogen sensors for leak detection and concentration monitoring is rising. An electrical hydrogen gas sensor platform based on Pd-Co composite materials has been developed, showing fast response, high accuracy, low detection limit, and long-term stability.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Azar Ostovan, S. Shahab Naghavi
Summary: The research focuses on the development of highly selective and eco-friendly materials for gas detection in daily life, such as the Internet of Things. By using the density functional non-equilibrium Green's function formalism, the researchers screened the bio-inspired metalloporphyrin (MPor) based junctions and found that the CrPor-based device showed sensitivity and selectivity for NO detection. The contaminated sensor can be recovered quickly at a low bias voltage. The computational approach provides a basis for further optimization and development of gas nanosensors.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Neermunda Shabana, Ajith Mohan Arjun, Menon Ankitha, Sabarija A. Mohandas, Praveena Gangadharan, Pathath Abdul Rasheed
Summary: This study demonstrates the successful detection of CAR and DA using a facile modification strategy of drop-casting DMSO onto carbon cloth. The modified CC showed wide detection ranges and high sensitivity for CAR and DA. The detection of these neurotransmitters in real samples such as human serum indicates the potential application of this versatile sensing platform in medical scenarios.
ANALYTICAL METHODS
(2023)
Article
Nanoscience & Nanotechnology
Kaitao Wang, Hulin Wang, Chunmei Chen, Weijun Li, Lin Wang, Feng Hu, Fengmei Gao, Weiyou Yang, Zhenxia Wang, Shanliang Chen
Summary: In this study, a high-performance ultraviolet photodetector with single-crystal integrated self-supporting 4H-SiC nanohole arrays was constructed using the anode oxidation approach. The device exhibited high switching ratio, remarkable detectivity, fast response, and excellent stability under 375 nm light illumination. The synergistic effect of SiC nanohole arrays' geometry, a whole single-crystal integrated self-supporting film without interfaces, established reliable Schottky contact, and incorporated N dopants were identified as the key factors for the high performance of the photodetector.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zhenshi Chen, Xincheng Huang, Hui Zhang
Summary: A high performance surface plasmon resonance (SPR) fiber sensor based on metallic elliptical nanohole and circular nanodisk binary array is designed and investigated in this work. The binary array structure integrated on the end facet of optical fiber can generate three optical resonance dips in the near-infrared region. The first dip shows narrow linewidth, high peak-to-dip signal ratio, and sensitivity. The sensor exhibits high refractive index (RI) sensitivity, narrow FWHM, and high FOM value simultaneously. The composite plasmonic structure of nanodisk and elliptical nanohole array can generate SPR modes with sharper spectral feature, which is crucial for high sensitivity and precision detection technology.
Article
Chemistry, Inorganic & Nuclear
Ying Liu, Jinni Zhao, Xiaoping Yang, Xilong Leng, Chengri Wang, Zhi Yang, Desmond Schipper
Summary: A near-infrared luminescent Cd-(II)-Nd-(III) nanocluster 1 (molecular dimensions of 1.0 nm x 2.2 nm x 2.2nm) was synthesized using a Schiff base ligand. It can be used as a sensor for wavelength-dependent detection of rutin, even in the presence of other interfering substances.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Biomedical
Sheng Zhang, Wenjie Zhao, Junyan Zeng, Zhaotao He, Xiang Wang, Zehui Zhu, Runqing Hu, Chen Liu, Qianqian Wang
Summary: The development of wearable non-invasive glucose sensors allows for convenient monitoring of diabetes patients' glucose concentration without discomfort and risk of infection. Metallic nanomaterials, with their good biocompatibility, large specific surface area, high catalytic activity, and strong adsorption capacity, are the optimal materials for these sensors. This review summarizes the metallic nanomaterials used in wearable non-invasive glucose sensors and their applications in glucose detection, as well as discussing the future development trends of these sensors.
MATERIALS TODAY BIO
(2023)
Article
Engineering, Electrical & Electronic
Di Wu, Ling Weng, Xiaorui Zhang, Lizhu Guan, Zijian Wu
Summary: In recent years, wearable devices have rapidly developed. The flexible piezoresistive sensors have been widely used in various fields such as human health monitoring, motion monitoring, artificial intelligence, and wearable electronic devices due to their excellent performance. This paper designs a wearable flexible multilayer piezoresistive sensor based on mulberry silk fabric. By coating polydopamine (PDA), silver nanoparticles (AgNPs), MXene, and polypyrrole (PPy) layer-by-layer on the surface of the mulberry silk fabric, and stacking five layers of conductive fabric together using 3M tape, PDMS resin, and flexible wire for encapsulation, a wearable flexible multilayer piezoresistive sensor is obtained. The sensor exhibits excellent performance with a sensitivity of 2.0510 under low strain, a sensitivity of 1.1171 under high strain, and a cycle stability of 1000 times, surpassing previously reported sensors based on fabric and showing promising application prospects.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Mariia Pushina, Sepideh Farshbaf, Wakana Mochida, Masashi Kanakubo, Ryuhei Nishiyabu, Yuji Kubo, Pavel Anzenbacher
Summary: The fluorescent carboxyamidoquinolines and their Zn(II) complexes were utilized to detect and distinguish various phosphate anions, showing high selectivity and sensitivity. A simple fluorescence chemosensor array with linear discriminant analysis successfully identified ATP, ADP, PPi, and Pi, while a support vector machine algorithm accurately quantified ATP in unknown samples.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yun-Cheng Ku, Jiunn-Woei Liaw, Szu-Yao Mao, Mao-Kuen Kuo
Summary: Theoretical study on the transition of a helical surface plasmon polariton (SPP) from a circular nanohole in a thick metal film to a spiral SPP outward propagating at the film's interface shows that the propagation length of mode-1 SPP is significantly longer than other modes in a specific frequency band, depending on the nanohole size. Numerical results demonstrate that most of the energy flux fanning out at the outlet as a dipole radiation after a helical SPP tunnels through a nanohole.
Article
Chemistry, Multidisciplinary
Shahab Razavi, Yiping Zhao
Summary: This study demonstrates that a hybridized plasmonic mode in a compound nanohole structure can be described as a quasi-dipole oscillator. By introducing two nanorods into a nanohole, these two quasi-dipoles can couple and hybridize, resulting in additional transmission peaks. The intensities and separations of these peaks can be controlled by adjusting the incident polarization and modifying the nanorod length. This concept can be extended to predict the behavior of more complex compound configurations, allowing for precise engineering of transmission peaks.
Article
Engineering, Electrical & Electronic
Raul Lora-Rivera, Oscar Oballe-Peinado, Fernando Vidal-Verdu
Summary: This article proposes a feature extraction algorithm for texture detection that is specifically designed to be implemented on embedded electronics using a field-programmable gate array (FPGA). By using smart tactile sensors for local preprocessing, the dexterity in artificial hands can be improved. The algorithm aims to achieve simplicity in order to be hardware-friendly and easily integrated with other circuitry, taking advantage of the parallel execution capabilities of FPGAs. The proposed algorithm was tested with a custom smart tactile sensor mounted on a Cartesian robot, and compared with a common feature extraction approach based on the fast Fourier transform (FFT).
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yadgar Abdulkarim, Fahmi F. Muhammadsharif, Mehmet Bakir, Halgurd N. Awl, Muharrem Karaaslan, Lianwen Deng, Shengxiang Huang
Summary: The study introduces a novel design of a real-time noninvasive metamaterial sensor, based on a corona-shaped resonator, for efficient detection of glucose in aqueous solutions. The sensor demonstrates good sensitivity and performance, with the ability to distinguish various glucose concentrations effectively.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Lixia Li, Wanlu Li, Xueyang Zong, Yang Zheng, Lin Cui, Yufang Liu
Summary: In this work, a fiber optic sensor based on dielectric nanostructure is proposed and demonstrated for low-cost, microsample testing and compact medical diagnostics. The sensing performance of the sensor, including bulk and surface sensitivities, is systematically investigated, and it is found that the FO sensor based on dielectric nanodisk exhibits a narrow resonance and a linear response to adsorbate layer thickness changes. The work opens a new opportunity for future bio-compatible, robust, and low-loss medical diagnostic devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
