Results 71 to 80 of about 118,744 (375)

Processing carbon nanotubes with holographic optical tweezers

, 2004
We report the first demonstration that carbon nanotubes can be trapped and manipulated by optical tweezers. This observation is surprising because individual nanotubes are substantially smaller than the wavelength of light, and thus should not be ...
Ashkin, Ashkin, Cheong, Curtis, Dai, Daniel M. Mueth, David G. Grier, Dufresne, Evan Tanner, Gahagan, Grier, He, Joseph Plewa, Korda, Lim, Nagahara, O’Connell, Simpson, Suehiro, Yu   +19 more
core   +1 more source

Alkaline-Earth Atoms in Optical Tweezers [PDF]

Physical Review X, 2018
We demonstrate single-shot imaging and narrow-line cooling of individual alkaline earth atoms in optical tweezers; specifically, strontium-88 atoms trapped in $515.2~\text{nm}$ light.
Alexandre Cooper, J. Covey, I. Madjarov, S. Porsev, M. Safronova, M. Endres   +5 more
semanticscholar   +1 more source

Transparent Inorganic–Organic Bilayer Neural Electrode Array and Integration to Miniscope System for In Vivo Calcium Imaging and Electrophysiology

Advanced Functional Materials, EarlyView.
This study presents the BioCLEAR system, a highly transparent and conductive neural electrode array composed of silver nanowires (AgNWs) and doped PEDOT:PSS, enabling neural recordings with minimal optical artifacts. When integrated with a GRIN lens, this cost‐effective neural implant allows simultaneous electrophysiological recording and GCaMP6‐based ...
Dongjun Han, Kevin Cheng, Swathy Sampath Kumar, Anil Bollimunta, Elizabeth E. Torr, Juhwan Kim, Kyoungmin Kim, Hyungjun Choi, Seongkwon Hwang, Sarah Brodnick, David Cheng, Lindsay Gray, Yei Hwan Jung, William L. Murphy, Aaron J. Suminski, Jonathan J. Nassi, Justin C. Williams, Dong‐Wook Park   +17 more
wiley   +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

Capillary wave tweezer

Scientific Reports
AbstractPrecise control of microparticle movement is crucial in high throughput processing for various applications in scalable manufacturing, such as particle monolayer assembly and 3D bio-printing. Current techniques using acoustic, electrical and optical methods offer precise manipulation advantages, but their scalability is restricted due to issues
Bethany Orme, Hamdi Torun, Matthew Unthank, Yong-Qing Fu, Bethan Ford, Prashant Agrawal   +5 more
openaire   +3 more sources

Biomimetic Iridescent Skin: Robust Prototissues Spontaneously Assembled from Photonic Protocells

Advanced Functional Materials, EarlyView.
Uniform nanoparticles are induced to form arrays (photonic crystals) in the cores of biopolymer capsules, endowing these ‘protocells’ with structural color. These protocells are then assembled into large self‐standing objects, i.e., prototissues, with robust mechanical properties as well as iridescent optical properties.
Medha Rath, Briahnah Streeter, Satyam Srivastava, Jemma Wood, William E. Bentley, Taylor J. Woehl, Srinivasa R. Raghavan   +6 more
wiley   +1 more source

Holographic aberration correction: optimising the stiffness of an optical trap deep in the sample [PDF]

, 2011
We investigate the effects of 1st order spherical aberration and defocus upon the stiffness of an optical trap tens of μm into the sample. We control both these aberrations with a spatial light modulator. The key to maintain optimum trap stiffness over a
Bowman, Bowman, Cižmár, Curtis, Gibson, Graham Gibson, Huang, Jesacher, Ke, Maria Dienerowitz, Miles Padgett, Padgett, Reicherter, Reihani, Reihani, Richard Bowman, Rohrbach, Sheppard, Sheppard, Sinclair, Theofanidou, Vellekoop, Wulff   +22 more
core   +1 more source

Self-Navigated 3D Acoustic Tweezers in Complex Media Based on Time Reversal

Research, 2021
Acoustic tweezers have great application prospects because they allow noncontact and noninvasive manipulation of microparticles in a wide range of media.
Ye Yang, Teng Ma, Sinan Li, Qi Zhang, Jiqing Huang, Yifei Liu, Jian-Xin Zhuang, Yongchuan Li, Xuemin Du, L. Niu, Yang Xiao, Congzhi Wang, Feiyan Cai, Hairong Zheng   +13 more
semanticscholar   +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

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