Results 221 to 230 of about 15,498 (244)

Light‐Activated Active Colloid Ribbons

Angewandte Chemie, 2017
AbstractWe report a dynamic self‐organization of self‐propelled peanut‐shaped hematite motors from non‐equilibrium driving forces where the propulsion can be triggered by blue light. They result in one‐dimensional, active colloid ribbons with a positive phototactic characteristic.
Zhihua Lin, Tieyan Si, Zhiguang Wu, Changyong Gao, Xiankun Lin, Qiang He   +5 more
openaire   +2 more sources

Enzymatically active colloidal crystal arrays

Journal of Colloid and Interface Science, 2009
We report the construction of three-dimensional (3D) colloidal crystal arrays (CCA) and hollow colloidal crystal arrays (HCCA) derived from the self-assembly of polyelectrolytes (PE)-coated polystyrene (PS) particles and their use as models of high surface area systems to immobilize peroxidase (POD).
Yu, A., Liang, Z.
openaire   +3 more sources

Hæmolytic Activity of Colloidal Silica

Nature, 1961
COLLOIDAL silica is highly toxic when administered parenterally1,2. In isolated biological systems silica has been shown to interfere with some enzymes3,4, activate blood clotting and pharmacologically active substances in plasma5 and interfere with the red cell envelope6.
J D, HARLEY, J, MARGOLIS
openaire   +2 more sources

Active sculpting of colloidal crystals

The Journal of Chemical Physics, 2019
The development of colloidal particles that can become self-propelled when exposed to a source of light of a given frequency represents one of the most exciting new developments in the field of active matter. In this paper, we perform numerical simulations to explore several properties of crystalline colloidal aggregates in the presence of such ...
S. Das, M. Lee Bowers, C. Bakker, A. Cacciuto   +3 more
openaire   +2 more sources

Chemically active colloidal superstructures

Nanoscale
This review explores the self-propulsion mechanisms of chemically driven colloidal motors, the principles of their chemical communication, and strategies for the directed assembly of active colloidal superstructures.
Yang Huang, Changcheng Ke, Celi Lou, Qiang He   +3 more
openaire   +2 more sources

Surface Activity of Soft Polymer Colloids

Langmuir, 2019
We investigate the behavior of polymer colloids at the interface between two immiscible liquids using molecular dynamics simulations. We study several colloid morphologies with various degrees of amphiphilicity, that is, purely solvophobic homogeneous and Janus particles and amphiphilic Janus and core-shell particles.
Tatiana I. Morozova, Arash Nikoubashman
openaire   +2 more sources

Biological activity of nanoscale colloidal selenium

Doklady Biochemistry and Biophysics, 2012
Several studies have shown that elements (metals and nonmetals) in the nanoscale form are much less toxic and do not accumulate in the body, as they are assimilated as trace elements in the process of metab olism. Thus, the active ingredients of drugs and feed additives in the form of nanoscale elements are com plexes of nanoparticles, which are ...
I N, Nikonov, J G, Folmanis, L V, Kovalenko, G Y, Laptev, G E, Folmanis, I A, Egorov, V I, Fisinin, I G, Tananaev   +7 more
openaire   +2 more sources

Mobile nanotweezers for active colloidal manipulation

Science Robotics, 2018
Mobile nanotweezers integrate plasmonic nanostructures with magnetic, helical microrobots for manipulation of nano-objects.
Souvik Ghosh, Ambarish Ghosh
openaire   +3 more sources

Transport on Active Paramagnetic Colloidal Networks

The Journal of Physical Chemistry B, 2016
We dynamically self-assemble an active paramagnetic colloidal network that ballistically transports nonmagnetic fluorescent colloidal particles on top of the network. The transport mechanism is put into effect by a directed hydrodynamic flow, created by the rotation of individual colloids forming the network.
Florian J, Maier, Thomas M, Fischer
openaire   +2 more sources

Active Colloids

Active colloids are self-propelled particles, powered by energy harvested from the environment. This field of research has been growing over the past 20 years, attracting researchers from multiple disciplines. Biomedical engineers seek to harness the abilities of motile bacteria, materials chemists are fascinated by the concept of synthetic particles ...
openaire   +1 more source