Results 41 to 50 of about 53,364 (200)

Microscopic Control and Detection of Ultracold Strontium in Optical-Tweezer Arrays

Physical Review X, 2018
Optical tweezers provide a versatile platform for the manipulation and detection of single atoms. Here, we use optical tweezers to demonstrate a set of tools for the microscopic control of atomic strontium, which has two valence electrons.
M. A. Norcia, A. W. Young, A. M. Kaufman   +2 more
doaj   +1 more source

Drug Targeting Model of Composite Gold-Tourmaline for Cells Enhancing Applications

Nano Biomedicine and Engineering, 2015
The drug delivery and targeting method of gold tourmaline composite atoms generated by optical tweezers in a micro-optical device system is proposed.
Preecha P. Yupapin, Senee Suwandee
doaj   +1 more source

Optical tweezers: wideband microrheology

, 2010
Microrheology is a branch of rheology having the same principles as conventional bulk rheology, but working on micron length scales and micro-litre volumes.
Cooper, Jonathan M., Evans, R. M. L., Gibson, Graham M., Padgett, Miles J., Preece, Daryl, Tassieri, Manlio, Warren, Rebecca   +6 more
core   +1 more source

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

Acousto-holographic optical tweezers

Optics Letters, 2020
Acousto-optic deflectors (AODs) allow the creation of multiple optical traps by time-sharing, that is, by rapidly cycling the laser focus between designated spatial locations. The traps thus formed are not permanent. In this Letter, we successfully demonstrate the creation of multiple and permanent traps by means of AODs driven by specially encoded ...
R. Bola, D. Treptow, A. Marzoa, M. Montes-Usategui, E. Martín-Badosa   +4 more
openaire   +5 more sources

3D‐Printed Sulfur‐Derived Polymers With Controlled Architectures for Lithium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
Rheology‐guided formulation design for direct ink writing enables the fabrication of 3D sulfur copolymer cathodes with controlled architectures for lithium‐sulfur batteries. The printed electrodes exhibit multiscale porosity and high sulfur utilization, delivering enhanced electrochemical performance compared to conventional cast electrodes.
Bin Ling, Haoran Wang, Pan Yang, Rishav Agrawal, Alex R. Neale, Laurence J. Hardwick, Tom Hasell, Esther García‐Tuñón   +7 more
wiley   +1 more source

Optical tweezing of microparticles and cells using silicon-photonics-based optical phased arrays

Nature Communications
Integrated optical tweezers have the potential to enable highly-compact, low-cost, mass-manufactured, and broadly-accessible optical manipulation when compared to standard bulk-optical tweezers.
Tal Sneh, Sabrina Corsetti, Milica Notaros, Kruthika Kikkeri, Joel Voldman, Jelena Notaros   +5 more
doaj   +1 more source

Position clamping in a holographic counterpropagating optical trap [PDF]

, 2011
Optical traps consisting of two counterpropagating, divergent beams of light allow relatively high forces to be exerted along the optical axis by turning off one beam, however the axial stiffness of the trap is generally low due to the lower numerical ...
Alexander Jesacher, Alexandrov, Ashkin, Ashkin, Bowman, Bowman, Constable, Dam, Dam, Graham Gibson, Gregor Thalhammer, Grier, Guck, Lee, Miles Padgett, Molloy, Molloy, Monika Ritsch-Marte, Neuman, Otto, Perch-Nielsen, Pitzek, Preece, Reicherter, Richard Bowman, Rodrigo, Rodrigo, Sehgal, Sinclair, Svoboda, Tauro, Thalhammer, Wallin, Woerdemann, Wulff, Zwick   +35 more
core   +1 more source

Adaptive 4D‐Printed Vascular Stents With Low‐Temperature‐Activated and Intelligent Deployment

Advanced Functional Materials, EarlyView.
Microarchitected coronary artery stents were fabricated using a polycaprolactone (PCL)‐based shape memory polymer (SMP) composite via projection micro‐stereolithography (PµSL) 4D printing. By incorporating diethyl phthalate (DEP) as a plasticizer, the thermal transition temperature (Ttran) was modulated to about 37°C, enabling rapid and autonomous ...
Yannan Li, Yifan Pan, Chikahiro Imashiro, Chaolun Xu, Jianxian He, Jingao Xu, Kewei Song, Ze Zhang, Chen Gao, Junbo Jiang, Runhuai Yang, Kayo Hirose, Shinjiro Umezu   +12 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