Results 51 to 60 of about 102,784 (341)

Three-dimensional trapping and assembly of small particles with synchronized spherical acoustical vortices

, 2020
Three-dimensional harmless contactless manipulation and assembly of micro-objects and micro-organisms would open new horizons in microrobotics and microbiology, e.g. for microsystems assembly or tissue engineering. In our previous work [Gong and Baudoin,
Baudoin, Michael, Gong, Zhixiong
core   +1 more source

Supramolecular Chemistry of Polymer-Based Molecular Tweezers: A Minireview

Surfaces
Polymer-based molecular tweezers have emerged as a prominent research area due to their enhanced ability to form host–guest complexes, driven by advancements in their design and synthesis. The impact of the spacer structure on the tweezers is predominant.
Bahareh Vafakish, Lee D. Wilson
doaj   +1 more source

Theoretical Analysis and Experimental Verification of the Influence of Polarization on Counter-Propagating Optical Tweezers

Micromachines, 2023
Counter-propagating optical tweezers are experimental platforms for the frontier exploration of science and precision measurement. The polarization of the trapping beams significantly affects the trapping status. Using the T-matrix method, we numerically
Ming Chen, Wenqiang Li, Jianyu Yang, Mengzhu Hu, Shidong Xu, Xunmin Zhu, Nan Li, Huizhu Hu   +7 more
doaj   +1 more source

Opto-hydrodynamic tweezers

Lab on a Chip
The manuscript unveils a portable optofluidic device for precise trapping, manipulation, and sorting of single cells/particles using a single standard unmodified optical fiber in a microfluidic channel—a notable advance in optofluidic technology.
Shreyas Vasantham, Abhay Kotnala, Yurii Promovych, Piotr Garstecki, Ladislav Derzsi   +4 more
openaire   +2 more sources

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source

Fundamental constraints on particle tracking with optical tweezers

, 2012
A general quantum limit to the sensitivity of particle position measurements is derived following the simple principle of the Heisenberg microscope. The value of this limit is calculated for particles in the Rayleigh and Mie scattering regimes, and with ...
Ditchburn R W, Huffman D R, Joachim Knittel, Michael A Taylor, Nieminen T A, Stefszky M S, Taylor M A, Taylor M A, Warwick P Bowen   +8 more
core   +1 more source

Quantum limited particle sensing in optical tweezers [PDF]

, 2009
Particle sensing in optical tweezers systems provides information on the position, velocity and force of the specimen particles. The conventional quadrant detection scheme is applied ubiquitously in optical tweezers experiments to quantify these ...
B. J. Berne, H. C. Van De Hulst, Jian Wei Tay, Magnus T. L. Hsu, Warwick P. Bowen   +4 more
core   +2 more sources

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

Nanoscale integration of single cell biologics discovery processes using optofluidic manipulation and monitoring. [PDF]

, 2019
The new and rapid advancement in the complexity of biologics drug discovery has been driven by a deeper understanding of biological systems combined with innovative new therapeutic modalities, paving the way to breakthrough therapies for previously ...
Chen, Ching, Chen, Irwin, Chong, Su, Hamburger, Agi, Jess, Philip, Jorgolli, Marsela, Le, Kim, Lin, Fen-Fen, Miranda, Les P, Mock, Marissa, Munro, Trent, Nevill, Tanner, Stevens, Jennitte, Tagari, Philip, Tan, Christopher, Winters, Aaron, Wu, Ming, Xu, Han   +17 more
core   +1 more source

Magnetic tweezers to capture the fast-folding λ6-85 in slow motion

Communications Physics
Force spectroscopy gives access to the underlying free energy landscape of protein folding. Proteins exhibit folding rates between microseconds and hours.
César Augusto Quintana-Cataño, Ann Mukhortava, Mordjane A. Boukhet, Andreas Hartmann, Karl-Ludwig Schumann, Michael Schlierf   +5 more
doaj   +1 more source