Article
Chemistry, Physical
Jianxing Zhou, Xiaoqi Dai, Yuhang Peng, Yili Zhong, Ho-Pui Ho, Yonghong Shao, Bruce Zhi Gao, Junle Qu, Jiajie Chen
Summary: Nanotweezers based on the sign transformation of the thermophoresis coefficient provide a new method for manipulating nanoparticles without the need for additional agents, expanding the applications of optical tweezers in the biological field.
Article
Chemistry, Multidisciplinary
Pavana Siddhartha Kollipara, Zhihan Chen, Yuebing Zheng
Summary: Optothermal manipulation is a versatile technique that combines optical and thermal forces to control micro-/nanoparticles and biological entities. It overcomes the limitations of traditional optical tweezers and has a wide range of applications in biology, nanotechnology, and robotics. However, there are current challenges in experimental and modeling aspects, which need to be addressed for further advancements in this field.
Article
Chemistry, Physical
Hongru Ding, Pavana Siddhartha Kollipara, Linhan Lin, Yuebing Zheng
Summary: Optothermal tweezers, with superior manipulation capability at low optical intensity, are limited by implicit understanding of the working mechanism. By revealing the atomistic view of opto-thermo-electro-mechanic coupling, we have developed high-performance tweezers using low-concentrated electrolytes and demonstrated their efficiency in separating colloidal particles based on surface charge differences.
Review
Optics
K. Monisha, K. Suresh, Sajan D. George
Summary: The conversion of light to heat via the photothermal effect has been used to evaluate thermo-optic properties of materials, but recently it has also been used for the manipulation of colloidal objects and living cells. Optothermal manipulation techniques utilize lower optical power and can manipulate particles over a long range compared to conventional optical tweezers. This review discusses the working mechanisms, concepts, and applications of recently established optothermal techniques, as well as the physical mechanisms behind the optical manipulation.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Diptabrata Paul, Rahul Chand, G. V. Pavan Kumar
Summary: In this study, the thermophoretic behavior of active colloids was investigated through optothermal interaction, and a re-configurable dynamic assembly was formed using the optical gradient-enabled attraction and short-range repulsion between the colloids. The assembly also exhibited self-evolution as a new colloid joined the structure. Additionally, the structural orientation of the colloids could be modulated by the incident polarization state of the optical field.
Article
Optics
Jiajie Chen, Zhi Chen, Changle Meng, Jianxing Zhou, Yuhang Peng, Xiaoqi Dai, Jingfeng Li, Yili Zhong, Xiaolin Chen, Wu Yuan, Ho-Pui Ho, Bruce Zhi Gao, Junle Qu, Xueji Zhang, Han Zhang, Yonghong Shao
Summary: Optothermal nanotweezers have been developed as an innovative optical manipulation technique that combines optothermal manipulation and CRISPR-based bio-detection. This innovative approach endows optical tweezers with the ability to identify DNA in aqueous solutions.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Analytical
Gareth W. H. Evans, Wahida T. Bhuiyan, Susan Pang, Brett Warren, Kyriacos Makris, Sharon Coleman, Sammer-ul Hassan, Xize Niu
Summary: Real-time point-of-care monitoring of chemical biomarkers holds great potential in disease diagnostics and precision medicine. A prototype device described in this paper is capable of autonomously performing ELISA at a high frequency using droplet microfluidics, showing promising results for rapid and accurate detection of biomarkers like cortisol. This approach could serve as a platform technology for measurement or continuous monitoring of biomarkers at the point-of-care.
Article
Chemistry, Multidisciplinary
Hongru Ding, Zhihan Chen, Pavana Siddhartha Kollipara, Yaoran Liu, Youngsun Kim, Suichu Huang, Yuebing Zheng
Summary: This study develops an optothermal platform for versatile manipulation of synthetic micro/nanoparticles and live cells using an ultralow-power laser beam and a simple optical setup. Five working modes can be switched through computer programming, and programmable multimodal control of micro/nanoparticles is achieved by incorporating a feedback control system.
Article
Optics
Mohsen Samadi, Pooya Alibeigloo, Abolfazl Aqhili, Mohammad Ali Khosravi, Farahnaz Saeidi, Shoaib Vasini, Mostafa Ghorbanzadeh, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: Plasmonic tweezers are indispensable tools for manipulating micro and nano-objects with high precision, utilizing surface plasmon technology to trap particles beyond the diffraction limit. Trapping-potential landscape can be reconfigured by designing plasmonic nanostructures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jiajie Chen, Jianxing Zhou, Yuhang Peng, Xiaoqi Dai, Yan Tan, Yili Zhong, Tianzhong Li, Yanhua Zou, Rui Hu, Ximin Cui, Ho-Pui Ho, Bruce Zhi Gao, Han Zhang, Yu Chen, Meiting Wang, Xueji Zhang, Junle Qu, Yonghong Shao
Summary: This study presents a highly adaptable optothermal nanotweezers that can manipulate nanoparticles of various types and sizes. It introduces a novel optothermal doughnut-shaped vortex trapping strategy that enables a new mode of physical interaction between nanoparticles and cells.
ADVANCED MATERIALS
(2023)
Article
Biochemical Research Methods
Kiana Malmir, William Okell, Aurelien A. P. Trichet, Jason M. Smith
Summary: In this study, we present a method for analyzing the physical properties of nanoparticles in fluids using a microfluidic device with integrated optical microcavities that act as both an optical trap and a sensor. This technique allows for measuring particle size and has potential applications in nanomedicine and other fields.
Article
Nanoscience & Nanotechnology
Weina Zhang, Mingcong Wen, Pu Liu, Guowei Yang, Hongxiang Lei
Summary: Metal nanowires are difficult to manipulate optically due to their high absorption and scattering characteristics, but a microsphere-assisted indirect optical manipulation method has been proposed in this study. By actuating a microsphere to generate a microvortex, a single Ag nanowire can be precisely rotated and oriented without direct interaction between the light and the nanowires. This method is simple, general, and has great significance for the fabrication of optoelectronic nanodevices.
Review
Chemistry, Multidisciplinary
Shaofeng Liu, Linhan Lin, Hong-Bo Sun
Summary: The optical manipulation of tiny objects is crucial for materials science and life science, involving direct and indirect optomechanical coupling. Traditional optical tweezers require high optical power and rigorous optics, while opto-thermophoretic manipulation techniques feature low optical power and high efficiency as a new emerging approach.
Review
Chemistry, Physical
Xixi Chen, Yanan Zhao, Yao Zhang, Baojun Li, Yuchao Li, Lingxiang Jiang
Summary: This article provides an overview of the important role of optical manipulation in soft matter research, discussing the optical mechanisms governing the interaction between light and soft matter materials. It also explores the wide range of applications and future prospects that arise from the collaboration between optical manipulation and soft matter materials in emerging fields.
Article
Nanoscience & Nanotechnology
Ramin Jamali, Farzaneh Nazari, Azadeh Ghaffari, Sabareesh K. P. Velu, Ali-Reza Moradi
Summary: The study explores the use of speckle tweezers (ST) to manipulate low index micro-particles by repelling them from high intensity regions to lower intensity regions for local confinement. The experiments validate the method and show that ST can also manipulate nanoparticle (NP)-loaded liposomes, enabling collective manipulation of drug micro-containers.