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
Physics, Multidisciplinary
Di Huang, Pengcheng Wan, Ling Zhou, Haiqin Guo, Ruihuang Zhao, Jun Chen, Jack Ng, Junjie Du
Summary: The working mechanism of single-beam optical tweezers is thoroughly examined using a newly established method. The conservative and nonconservative components of optical force are calculated for different optical regimes, and the concept of an "optical trapping core" is proposed to better illustrate the stability of the trapping process.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Hui Shi, Xiangmin Huang, Kaiyang Jiang, Hang Zhao, Jun Ma, Xiaofeng Shi
Summary: This study proposes an efficient method of directional optical manipulation of nanoparticles based on a laser photothermal trap, and clarifies the influence mechanism of external conditions on the photothermal trap. It is determined through experiments and simulations that the main cause of directional motion of gold nanoparticles is the drag force. The laser power, boundary temperature, and thermal conductivity of the substrate and liquid level affect the intensity of the photothermal trap and the movement speed of gold particles.
Article
Physics, Multidisciplinary
Sen Yang, Joshua A. Allen, Chuchuan Hong, Kellen P. Arnold, Sharon M. Weiss, Justus C. Ndukaife
Summary: This theoretical study investigates the use of photonic crystal cavities with bowtie defects for low-power nanoscale optical trapping. By utilizing localized heating and an alternating current electric field, particles can be transported towards the bowtie region with average radial velocities of 30 μm/s by switching the input wavelength. Once trapped in the bowtie region, a 10 nm quantum dot can be stably trapped using a mW input power.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Analytical
Xiaoqing Gao, Cong Zhai, Zuzeng Lin, Yulu Chen, Hongbin Li, Chunguang Hu
Summary: This paper investigates the trapping process and steady position and orientation of Janus particles in a linearly polarized optical trap. The trapping trajectory and a practical simulation solution for more complex structures and trapping motions are revealed through simulation and experimentation.
Article
Optics
Hao Wu, Ping Zhang, Xuejing Zhang, Yi Hu, Zhigang Chen, Jingjun Xu
Summary: We report the selective trapping of chiral nanoparticles using vector Lissajous beams. By choosing appropriate parameters to determine the polarization vectors of light, local optical chirality densities appear in these beams. For a specific parameter set (p,q) = (2,1), which is preferred for selective trapping, the resulting vector beam has two dominant intensity spots with opposite chirality. In the transverse plane, one spot can trap a chiral particle while the other spot repels the same particle, and this can be reversed for particles with opposite chirality. The study analyzes the effect of various chiral parameters and particle radii on selective trapping. The non-conservative longitudinal forces are also discussed. The functionality achieved in identifying and separating different chiral particles may have applications in enantiomer separation and drug delivery in the field of pharmaceutics.
Article
Optics
Niels Gieseler, Aso Rahimzadegan, Carsten Rockstuhl
Summary: Laser-driven spacecrafts show promise for outer space exploration, but challenges regarding spacecraft stability and reflection need to be addressed. Researchers propose a design for lightweight, low-absorbing, high-reflective, and self-stabilizing curved metasurfaces.
Review
Chemistry, Analytical
Dasheng Lu, Francisco Gamez, Patricia Haro-Gonzalez
Summary: In recent years, optically trapped luminescent particles have been used as reliable probes for contactless thermal sensing due to their luminescence dependence on environmental conditions. Despite temperature effects in optical trapping stability not always being the focus of study, disturbances caused by even a slight temperature increase in Brownian motion can hinder the optical trapping of micro/nanoparticles above room temperature and potentially lead to particle release from the trap. This report summarizes recent experimental results on thermal sensing using micro/nanoparticles as probes, aiming to provide an overview of the contemporary state of the art regarding temperature effects on the stability of potential trapping processes.
Article
Materials Science, Multidisciplinary
Danthure Arachchige Dayantha Lankanath Karunasena, Guangqing Du, Qing Yang, Gulshan Iqbal, Noor Uddin, Xun Hou, Feng Chen
Summary: Theoretical investigation into stable plasmonic trapping of sub-50nm targets using integrated gold-graphene V-trench with deep potential well. A hybrid plasmonic trapping model considers surface plasmons excitation for supporting scattering and gradient optical forces on nano-scale. Experimental results demonstrate successful trapping of 40nm gold nano-sphere within designed nano-V-trench with extremely deep potential well, showcasing potential applications in nano-manipulations.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Optics
Liyong Cui, Neng Wang
Summary: This work investigates the trapping and self-assembly of particles by a single photonic chiral surface wave (PCSW) in a waveguide. It shows that PCSW can stably trap and assemble particles of arbitrary sizes, shapes, and dielectric constants. The unique properties of PCSW allow for independent particle trapping during the self-assembly process.
Article
Materials Science, Multidisciplinary
Evgeny N. Bulgakov, Almas F. Sadreev
Summary: In the first part of the paper, the authors demonstrate the sensitivity of equilibrium positions of small dielectric particles inside the Fabry-Perot resonator to the frequency and size of the incident electromagnetic wave. The second part discusses the interaction between nanoparticles and a long dielectric cylinder integrated into a metallic waveguide.
Article
Optics
A. P. Porfirev, S. A. Fomchenkov, D. P. Porfiriev, S. N. Khonina, S. V. Karpeev
Summary: In this study, we investigate the possibility of trapping airborne light-absorbing particles using a multi-linear optical trap created with a cylindrical lens. We find that different shaped light lines can be used to trap particles of different sizes due to the photophoretic forces being dependent on light intensity. However, the fading intensity of non-main light lines caused by initial laser power attenuation leads to a significant decrease in trapping robustness and the escape of smaller trapped particles.
Article
Optics
Ling Zhang, Anna Szmalenberg, Kevin Cook, Baolei Liu, Lei Ding, Fan Wang, David McGloin
Summary: It is essential to quantify the range of aerosol sizes that can be trapped in a counterpropagation dual-fiber trapping configuration in order to understand their manipulation and characterization. In this study, we present simulations and experiments to investigate the variations in trapped aerosol size range under different conditions. The results provide insights into the stability and tolerance of such traps.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Review
Chemistry, Analytical
Conghui Liu, Juejiao Huang, Tailin Xu, Xueji Zhang
Summary: This article reviews the characteristics and progress of light-responsive Janus micro-/nanomotors in biomedicine and focuses on their applications in biosensing, bioimaging, and theranostic. The remaining challenges in practical application are summarized, and potential solutions are proposed.
Review
Physics, Multidisciplinary
Agnese Callegari, Alessandro Magazzu, Andrea Gambassi, Giovanni Volpe
Summary: The article discusses the emergence of critical Casimir forces and the use of optical tweezers to study these forces. Experimentally studying critical Casimir forces using optical tweezers can play a crucial role in developing nano-technologies.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Organic
M. Liras, S. Simoncelli, A. Rivas-Aravena, O. Garcia, J. C. Scaiano, E. I. Alarcon, A. Aspee
ORGANIC & BIOMOLECULAR CHEMISTRY
(2016)
Article
Chemistry, Multidisciplinary
Sabrina Simoncelli, Johannes Summer, Spas Nedev, Paul Kuehler, Jochen Feldmann
Article
Chemistry, Multidisciplinary
Sabrina Simoncelli, Yi Li, Emiliano Cortes, Stefan A. Maier
Article
Chemistry, Multidisciplinary
Sabrina Simoncelli, Yi Li, Emiliano Cortes, Stefan A. Maier
Editorial Material
Chemistry, Physical
Rosa Arrigo, Kassim Badmus, Francesca Baletto, Maurits Boeije, Michael Bowker, Katharina Brinkert, Aram Bugaev, Valerii Bukhtiyarov, Michele Carosso, Richard Catlow, Revana Chanerika, Philip R. Davies, Wilke Dononelli, Hans-Joachim Freund, Cynthia Friend, Simone Gallarati, Bruce Gates, Alexander Genest, Emma K. Gibson, Justin Hargreaves, Stig Helveg, Haoliang Huang, Graham Hutchings, Nicola Irvine, Roy Johnston, Stanley Lai, Carlo Lamberti, Joseph Macginley, David Marchant, Toru Murayama, Rene Nome, Yaroslav Odarchenko, Jonathan Quinson, Scott Rogers, Andrea Russell, Said Said, Paul Sermon, Parag Shah, Sabrina Simoncelli, Katerina Soulantica, Federico Spolaore, Bob Tooze, Laura Torrente-Murciano, Annette Trunschke, David Willock, Jiaguang Zhang
FARADAY DISCUSSIONS
(2018)
Article
Multidisciplinary Sciences
David J. Williamson, Garth L. Burn, Sabrina Simoncelli, Juliette Griffie, Ruby Peters, Daniel M. Davis, Dylan M. Owen
NATURE COMMUNICATIONS
(2020)
Article
Multidisciplinary Sciences
Alan M. Szalai, Bruno Siarry, Jeronimo Lukin, David J. Williamson, Nicolas Unsain, Alfredo Caceres, Mauricio Pilo-Pais, Guillermo Acuna, Damian Refojo, Dylan M. Owen, Sabrina Simoncelli, Fernando D. Stefani
Summary: The photometric method SIMPLER allows decoding of the axial position of single molecules in a total internal reflection fluorescence microscope without hardware modification, delivering nearly isotropic nanometric resolution 3D images in single-molecule localization microscopy. Achieving high axial resolution remains challenging in this field.
NATURE COMMUNICATIONS
(2021)
Article
Cell Biology
Sabrina Simoncelli, Juliette Griffie, David J. Williamson, Jack Bibby, Cara Bray, Rose Zamoyska, Andrew P. Cope, Dylan M. Owen
Article
Biochemistry & Molecular Biology
Megan D. Joseph, Elena Tomas Bort, Richard P. Grose, Peter J. McCormick, Sabrina Simoncelli
Summary: The study investigates the changes in complexes formed by GPCRs under different conditions, revealing a decrease in oligomer percentage under antagonistic conditions, while the oligomeric state of the receptors remains unchanged under agonist treatment.
Article
Biochemistry & Molecular Biology
Shu En Lim, Megan D. Joseph, Charlotte M. de Winde, Sophie E. Acton, Sabrina Simoncelli
Summary: Upon initial immune challenge, dendritic cells (DCs) migrate to lymph nodes and interact with fibroblastic reticular cells (FRCs) via C-type lectin-like receptor 2 (CLEC-2). CLEC-2 binds to the membrane glycoprotein podoplanin (PDPN) on FRCs, inhibiting actomyosin contractility through the FRC network and permitting lymph node expansion. CD44 is required for FRCs to respond to DCs and stabilize large pools of PDPN at the membrane of FRCs upon CLEC-2 interaction, facilitating cellular crosstalk between FRCs and DCs.
Article
Biology
Elena Tomas Bort, Megan D. Joseph, Qiaoying Wang, Edward P. Carter, Nicolas J. Roth, Jessica Gibson, Ariana Samadi, Hemant M. Kocher, Sabrina Simoncelli, Peter J. McCormick, Richard P. Grose
Summary: Pancreatic ductal adenocarcinoma (PDAC) has poor survival rates, but targeting the purinergic axis, particularly the P2RY2 gene, may present a potential therapy. By analyzing the PDAC extracellular purinome, P2RY2 was identified as strongly associated with hypoxia, highly expressed in cancer cells, and having a significant impact on survival. Furthermore, this study revealed a novel GPCR-integrin interaction involving P2Y(2) and aV integrins in ATP-driven invasion, suggesting its potential for therapeutic targeting.
Article
Biochemistry & Molecular Biology
M. Victoria Cappellari, Luis F. Marcano-Garcia, Sabrina Simoncelli, Pedro F. Aramendia
Summary: Single molecule fluorescence localization microscopy allows for high-precision molecular localization and correlation analysis. This study presents a method to calculate thermodynamic equilibrium constants and tests it using two different fluorescently labeled chains. The results show that the values obtained from STORM experiments are consistent with those from bulk experiments.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Chemistry, Physical
Sabrina Simoncelli, Evangelina L. Pensa, Thomas Brick, Julian Gargiulo, Alberto Lauri, Javier Cambiasso, Yi Li, Stefan A. Maier, Emiliano Cortes
FARADAY DISCUSSIONS
(2019)
Article
Chemistry, Multidisciplinary
Sabrina Simoncelli, Maria Makarova, William Wardley, Dylan M. Owen