Results 191 to 200 of about 6,250 (229)

Miniaturizing Chemistry and Biology in Microdroplets

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Kelly, Bernard, Baret, Jean-Christophe, Taly, Valérie, Griffiths, Andrew   +3 more
openaire   +2 more sources

Capturing Reactive Carbanions by Microdroplets

Journal of the American Chemical Society, 2022
Carbanions appear in many organic or biological reactions as fleeting intermediates, prohibiting direct observation or spectroscopic measurement. An aqueous environment is known to rapidly annihilate a carbanion species, reducing its lifetime to as short as picoseconds.
Anubhav Kumar, Supratim Mondal, Mohammad Mofidfar, Richard N. Zare, Shibdas Banerjee   +4 more
openaire   +2 more sources

A microdroplet-based shift register

Lab on a Chip, 2010
A microfluidic device is presented for the serial formation, storage and retrieval of water microdroplets in oil. The principle of operation is similar to that of an electronic shift register. Droplets, considered as units of information, can be arrayed and serially shifted within the device, allowing the controllable positioning of the emulsions and ...
Zagnoni, Michele, Cooper, Jonathan M
openaire   +4 more sources

Controlling Microdroplet Formation by Light

Langmuir, 1998
A surface with photocontrollable wetting behavior is introduced. A monolayer of a polymeric material containing 4‘-[trifluormethoxy-4,4‘-dibenzoazo] dyes in the side chains has been transferred on ...
Möller, G., Harke, M., Prescher, D., Motschmann, H.   +3 more
openaire   +2 more sources

Fluorescence Polarization Anisotropy in Microdroplets

The Journal of Physical Chemistry Letters, 2018
Chemical reactions can be greatly accelerated in microdroplets, but the factors that lead to acceleration are still being elucidated. Using rhodamine 6G (R6G) as a model compound, we studied the density distribution and fluorescence polarization anisotropy of this dye in water-in-oil microdroplets.
Zhenpeng Zhou, Xin Yan, Yin-Hung Lai, Richard N. Zare   +3 more
openaire   +2 more sources

Spontaneous Brillouin scattering in a microdroplet

Physical Review A, 1990
Spontaneous Brillouin scattering in a micrometer-sized liquid droplet is analyzed from first principles, using the spherical-wave normal-mode basis. Instead of the conservation of linear momentum, this interaction is governed by a selection rule due to the conservation of angular momentum. The Brillouin spectrum is then calculated, both for observation
, Ching, , Leung, , Young
openaire   +2 more sources

Injection seeding of lasing in microdroplets

Optics Letters, 1997
Injection seeding of lasing has been achieved in both small (~20-mu; m radius) and larger (~35-mu; m radius) dye-doped microdroplets. Seeding is effective in enhancing the intensity from one lasing mode that normally occurs because of the droplet morphology.
J R, Popp, M H, Fields, R K, Chang
openaire   +2 more sources

Microdroplet Chemistry with Unactivated Droplets

Journal of the American Chemical Society
Microdroplet chemistry has attracted much attention owing to its ability to accelerate otherwise slow reactions and to trigger thermodynamically forbidden reactions. The cause of this unique behavior is the intrinsic properties of the droplets, such as the spontaneously generated electric field on the droplet surface. However, some have argued that the
Huan Chen, Xiaoxu Li, Bowen Li, Yeye Chen, Haoran Ouyang, Youcun Li, Xinxing Zhang   +6 more
openaire   +2 more sources

Measurement of the hydrodynamic resistance of microdroplets

Lab on a Chip, 2016
Here, we demonstrate a novel method of measurement which determines precisely the hydrodynamic resistance of a droplet flowing through a channel.
openaire   +2 more sources

Phototaxis Flight of Microdroplets in a Laser

Physical Review Letters
Phototaxis phenomenon is fundamental and critical for optical manipulation of micro-objects. Here, we report the size-dependent negative or positive phototaxis behaviors for microdroplets containing interfacial energy absorber flying in a laser. The critical diameters for such negative-to-positive turnover are studied through both experiments and ...
Weizheng Cheng, Hanrui Zhu, Feiyu Zheng, Ben Chu, Ruitong Wang, Jinran Tao, Wanli Zhang, Peng Tao, Chengyi Song, Wen Shang, Benwei Fu, Tao Deng   +11 more
openaire   +2 more sources