Review
Chemistry, Analytical
Seunghun Lee, Hyerin Song, Heesang Ahn, Seungchul Kim, Jong-ryul Choi, Kyujung Kim
Summary: This article discusses the latest research methods and experimental results of fiber-optic LSPR sensors, confirming their potential applications in the fields of chemistry, physics, and biology with the ability to achieve high sensitivity target measurements.
Article
Engineering, Electrical & Electronic
Suratun Nafisah, Marlia Morsin, Rahmat Sanudin, Nur L. Razali, Zainiharyati Mohd Zain, Mitra Djamal
Summary: This study investigates the effects of surface density and aspect ratio of gold nanobipyramids (GNBPs) on the performance of localized surface plasmon resonance (LSPR)-based sensors. The experimental results show a linear relationship between the mean surface density and aspect ratio of GNBPs and the sensitivity of the LSPR-based sensor. The highest sensitivity is achieved with a surface density of 80.02% +/- 0.86% and an aspect ratio of 2.58 +/- 0.04. Additionally, this sample exhibits clear response recovery behavior and stable repeatability.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yumei Zhang, Liyun Ding, Jue Zhao, Xingdong Jiang, Fei Ma
Summary: Acetylcholine is an important neurotransmitter that can be detected using a simple electrostatic interaction to create an optical fiber biosensor. The biosensor has high sensitivity and a linear range, making it more convenient, simple, and cost-effective compared to traditional detection methods.
IEEE SENSORS JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Sheng-Hann Wang, Chia-Wen Kuo, Shu-Cheng Lo, Wing Kiu Yeung, Ting-Wei Chang, Pei-Kuen Wei
Summary: In this study, a spectral image contrast-based flow digital nanoplasmon-metry method was developed to amplify and quickly detect the peak shift signal of gold nanoparticles (AuNPs) by comparing the scattering image brightness in two neighboring wavelength bands near the local surface plasmon resonance (LSPR) peak. The method provides an ultrahigh signal-to-noise ratio and has a lower sample volume requirement compared to conventional LSPR immunoassays. It demonstrates high sensitivity, selectivity, and a broad dynamic detection range.
JOURNAL OF NANOBIOTECHNOLOGY
(2022)
Article
Biophysics
Zetao Chen, Fenni Zhang, Yaru Li, Jianzhen Shan, Yanli Lu, Qingjun Liu
Summary: The analysis of reactant at different regions of the bioreaction interface is important for studying the impact of interface conditions on bioreactions. In this study, a localized surface plasmon resonance (LSPR) biosensing platform was proposed for monitoring local charge density and detecting corresponding analytes. The researchers synthesized core-shell nanocomposites and modified tin-doped indium oxide (ITO) substrates for optical and electrochemical measurements. By immobilizing glucose oxidase (GOD) on the LSPR chips, the researchers demonstrated monitoring of charge transfer during the bioreaction of glucose catalysis. The charge density of the LSPR chip was detected using optical extinction peak shifts.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Yu Chen, Kai Yin, Yuxuan Xu, Min Liu, Han Huang, Fangping Ouyang
Summary: The remote excitation and remote-controlling of the localized surface plasmon resonance (LSPR) in a heterotype and hollow gold nanosheet (HGNS) is investigated using FDTD simulations. The LSPR wavelength and peak intensity in the HGNS depend on factors such as the polarization of the incident light and the symmetry of the heterotype structure. By optimizing the parameters, significant polar plots of the polarization-dependent LSPR peak intensity with various patterns are obtained, showing the potential applications in remote-controllable surface-enhanced Raman scattering (SERS), optical interconnects, and multi-channel waveguide switches.
Article
Engineering, Electrical & Electronic
Devi Taufiq Nurrohman, Nan-Fu Chiu
Summary: Gold nanoparticles (AuNPs) have unique properties and are widely used. This study investigates the signal characteristics of AuNPs-based localized surface plasmon resonance (LSPR) immunosensor through theoretical and experimental approaches. Simulation results show that the particle distance and the presence of dielectric material greatly affect the extinction and scattering spectra, while experimentally, the detection range of the sensor is limited by the enhanced electric field and the occurrence of the Hook effect at higher concentrations.
IEEE SENSORS JOURNAL
(2023)
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)
Article
Chemistry, Physical
Baoqiang Du, Jibing Tan, Chang Ji, Mingrui Shao, Xiaofei Zhao, Jing Yu, Chao Zhang, Chuansong Chen, Hui Pan, Baoyuan Man, Zhen Li
Summary: In this study, a thermoelectric induced surface-enhanced Raman scattering (SERS) substrate consisting of ZnO nanorod arrays and metal nanoparticles is proposed. It is demonstrated that the thermoelectric-induced enhancement of the SERS signals should be classified as a chemical contribution, and the electric regulation mechanism is proven to be universally applicable. Moreover, the fabricated substrate exhibits significant enhancement for various types of molecules and can be used to monitor and manipulate plasmon-activated redox reactions.
Review
Biotechnology & Applied Microbiology
Mitchell Lee Taylor, Raymond Edward Wilson, Kristopher Daniel Amrhein, Xiaohua Huang
Summary: Noble metal nanoparticles, especially gold nanorods, have been widely used in cancer photothermal therapy due to their unique optical properties and long blood circulation half-life. This review summarizes the optical properties of gold nanorods and their applications in photothermal therapy, as well as recent strategies to improve the therapy through combination with chemotherapy and photodynamic therapy.
BIOENGINEERING-BASEL
(2022)
Article
Chemistry, Analytical
Jingon Yoo, Soobin Han, Bumjun Park, Sonam Sonwal, Munirah Alhammadi, Eunsu Kim, Sheik Aliya, Eun-Seon Lee, Tae-Joon Jeon, Mi-Hwa Oh, Yun Suk Huh
Summary: The developed peptide-coated gold nanoparticles (AuNPs) based on localized surface plasmon resonance (LSPR) sensor chips have demonstrated high sensitivity and selectivity for detecting fipronil. The sensor offers features such as rapid analysis, cost-effectiveness, and the potential for mass production, making it a promising on-site detection tool for fipronil estimation.
Article
Engineering, Electrical & Electronic
Hsueh-Tao Chou, Wei-Chao Su, Tien-Ming Wu, Rui-Ping Chen
Summary: In this study, gold nanorods (GNRs) were immobilized on the surface of a fiber probe using a self-assembly method for a localized surface plasmon resonance (LSPR)-based optical fiber biosensor. The performance of GNRs films was improved by encapsulating them with graphene oxide (GO) to form GNRs@GO structure. The results showed that GNRs@GO fiber probes had higher sensitivity and linearity compared to GNRs fiber probes, and they exhibited good performance in immunoassays.
IEEE SENSORS JOURNAL
(2022)
Article
Biophysics
Aabha Bajaj, Mohammad Abutoama, Sivan Isaacs, Marwan J. Abuleil, Karin Yaniv, Ariel Kushmaro, Martina Modic, Uros Cvelbar, Ibrahim Abdulhalim
Summary: Unwelcomed biofilms are a problem in environments where moisture is present, such as food industries and wastewater treatment plants. Advanced label-free sensors like surface plasmon resonance (SPR) have been explored for monitoring biofilm formation, but conventional noble metal SPR substrates have limited penetration depth, hindering reliable detection. In this study, a plasmonic insulator-metal-insulator (IMI) structure with higher penetration depth was proposed for portable SPR devices. The optimized IMI structure showed strong penetration dependence on wavelength and incidence angle, providing more reliable results compared to thin gold film substrates. The methodology can detect and characterize biofilms with better signal reliability.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Angeline S. Dileseigres, Yoann Prado, Olivier Pluchery
Summary: The functionalization of gold nanoparticles with thiol molecules in solution is crucial for their application development. In this study, the changes in localized surface plasmon resonance (LSPR) peak due to the reaction between thiol molecules and gold nanoparticles were investigated using UV-visible spectroscopy. The saturation of thiol molecules on the nanoparticle surface was confirmed, and the wavelength shift was accurately predicted using an analytical model. The kinetics of the functionalization reaction were found to be rapid, completing in less than an hour.
Article
Chemistry, Multidisciplinary
Zhao Li, Jiangzhi Zi, Xue Luan, Yueqi Zhong, Minghan Qu, Yuzhe Wang, Zichao Lian
Summary: Combining metal nanoparticles with localized surface plasmon resonance (LSPR) with metal-organic framework (MOF)-based photocatalysts is an effective way to enhance the separation of electron-hole pairs. In this study, Au@NH2-UiO-66/CdS composites were synthesized by encapsulating Au nanoparticles with LSPR into NH2-UiO-66 nanocages and growing CdS nanoparticles on the surface. The composites exhibited higher photocatalytic activity in hydrogen evolution reaction compared to NH2-UiO-66/CdS and CdS alone under visible-light irradiation. The study also revealed the important role of MOF in transferring electrons and receiving hot electrons generated from plasmonic Au in Au@MOF/CdS composites to enhance the photocatalytic performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
S. Zhao, D. Sun, J. Zhang, H. Lu, Y. Wang, R. Xiong, K. T. Grattan
Summary: Significant progress has been made in micro-/nanorobotics research over the past 20 years, driven by substantial investment and the application of correlation techniques. Theoretical and experimental successes have led to advancements in clinical medicine and other emerging areas. This article categorizes micro-/nanorobots based on their propulsion modes, analyzes their advantages and drawbacks, and explores medical applications and future directions.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Analytical
Souvik Ghosh, Kasun Dissanayake, S. Asokan, T. Sun, B. M. Azizur Rahman, Kenneth T. V. Grattan
Summary: Research on compact, flexible optical sensors for water quality monitoring, specifically targeting heavy metal ion monitoring, has become extremely important. An innovative sensor solution based on optical fiber grating sensors has been proposed, which shows high sensitivity and selectivity in detecting sub-nanomolar concentration of lead ions.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Rahul Kumar, Hien Nguyen, Bruno Rente, Christabel Tan, Tong Sun, Kenneth T. Grattan
Summary: In this study, a portable optical fiber-based sensor for monitoring pH in microfluidic channels was developed. The sensor showed good performance and could be easily integrated with microfluidic systems.
Article
Energy & Fuels
Yihuan Li, Kang Li, Xuan Liu, Xiang Li, Li Zhang, Bruno Rente, Tong Sun, Kenneth T. V. Grattan
Summary: This study utilized FBG sensors to capture more process-related signals of batteries, and developed a hybrid machine learning framework for joint estimation of SOC and capacity, achieving significant improvements in estimation accuracy.
Article
Engineering, Multidisciplinary
Leifeng Zhang, Changle Li, Huijuan Dong, Xiaojing Liu, Tong Sun, Kenneth T. V. Grattan, Jie Zhao
Summary: Shape sensing is important for manipulating flexible needles. This study designed a 0.6 mm diameter stylet with Fiber Bragg Gratings (FBGs) and integrated a gradient-based optimization method for shape sensing, achieving low measurement errors.
Article
Engineering, Electrical & Electronic
M. S. M. Sa'ad, H. Ahmad, M. A. Alias, M. K. A. Zaini, K. S. Lim, S. W. Harun, K. T. V. Grattan, B. M. A. Rahman, G. Brambilla, S. A. Reduan, L. Bayang, M. F. Ismail
Summary: This article introduces a surface-mounted tilt sensor that is designed to measure the inclination angle of engineered structures or slopes in two directions. The sensor utilizes strain-sensitive fiber Bragg gratings (FBGs) for tilt angle measurement bidirectionally and uses a strain-free FBG for temperature compensation. The compact, robust, and easy-to-install tilt sensor shows excellent potential for various geotechnical applications, mainly in landslide detections, ground movement, and engineered slope monitoring, as supported by laboratory calibration and field test data.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Chunhua Qin, Yiyuan Wang, Ziying Liu, Wenjia Li, Yuxiang Li, Ping Li, Zheng Zhu, Chunying Guan, Jinhui Shi, Kenneth T. V. Grattan
Summary: In this study, a miniaturized high-efficiency polarizer based on an Au-on-silica grating structure has been proposed, which can cover the entire visible and near-infrared spectral ranges with an extinction ratio (ER) of 60 dB in this range. By regulating the thickness of the grating, an ER of up to 150 dB can be achieved. By integrating this high-performance polarizer with an optical fiber meta-tip, a refractive polarizer with an ER value of >45 dB over the entire spectral range has been demonstrated.
Article
Multidisciplinary Sciences
Tianlong Li, Shimin Yu, Bei Sun, Yilong Li, Xinlong Wang, Yunlu Pan, Chunlei Song, Yukun Ren, Zhanxiang Zhang, Kenneth T. V. Grattan, Zhiguang Wu, Jie Zhao
Summary: Swimming microrobots guided in the circulation system have great potential in precision medicine. A new design of swimming microrobots with clawed geometry, red blood cell (RBC) membrane-camouflaged surface, and magnetically actuated retention is discussed. The microrobots showed effective magnetic propulsion and active retention even against a flow of 2.1 cm/s, indicating promising biomedical applications.
Article
Engineering, Electrical & Electronic
Yunqing Guan, Ting Zhang, Xiaopeng Dong, Tong Sun, Kenneth Thomas Victor Grattan
Summary: This article presents a compact fiber-optic sensor based on a fiber Bragg grating (FBG), partially bonded with thick polyimide (PI) films, for the simultaneous measurement of humidity and temperature. The proposed sensing structure with PI films enhances the sensor response to both humidity and temperature significantly.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
Jie Zhao, Guanyu Mu, Huijuan Dong, Tong Sun, Kenneth Thomas Victor Grattan
Summary: Self-running piezoelectric robots have the advantages of being low cost, high load ratio, fast speed of operation, and few limitations in confined spaces or for underwater applications. A novel standing wave ratio (SWR)-based control method, using the adjustment of the temporal phase shift, ? has been derived and demonstrated to achieve smoother motion and higher resolution of the motion speed. Through a series of experiments, the motion characteristics of the robot, such as voltage-speed, load capacity, and ability to move on different surface materials, have been tested and reported.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Huijuan Dong, Mingyang Sui, Guanyu Mu, Jie Zhao, Tianlong Li, Tong Sun, Kenneth T. V. Grattan
Summary: This article discusses the use of surface acoustic wave (SAW) technology in lab-on-a-chip applications for droplet actuation. By adjusting the excitation phase shift, theta, of interdigital transducers (IDTs), the velocity and direction of microdroplets can be controlled. The authors present the equation for the vibration of mixed traveling surface acoustic waves (TSAWs) and standing surface acoustic waves (SSAWs) formed on the substrate surface operating in the exciter-exciter mode. They derive an analytical expression for the acoustic standing wave ratio as a function of theta and the spatial phase difference. Experimental results demonstrate the potential of the exciter-exciter mode in increasing the velocity of actuated droplets compared to the traditional exciter-absorber mode.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Electrical & Electronic
Hanqi Zhang, Qi Wu, Xiangrong Su, Jun Guo, Ke Xiong, Tong Sun, Kenneth T. V. Grattan
Summary: A cantilevered microfiber Bragg grating (CMFBG) sensor with high sensitivity and resonant frequency has been proposed and demonstrated. The CMFBG design allows for the reception of ultrasonic guided waves and the formation of standing waves, resulting in significant signal amplitude enhancements compared to conventional fiber Bragg gratings. The geometric parameters of the CMFBG design have been found to influence the ultrasonic sensitivity and resonant frequencies observed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
