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Microscopic artificial swimmers
- R. Dreyfus, J. Baudry, Marcus L. Roper, M. Fermigier, H. Stone, J. Bibette
- Physics, MedicineNature
- 6 October 2005
It is shown that a linear chain of colloidal magnetic particles linked by DNA and attached to a red blood cell can act as a flexible artificial flagellum, which induces a beating pattern that propels the structure, and that the external fields can be adjusted to control the velocity and the direction of motion.
Diagnosing hyperuniformity in two-dimensional, disordered, jammed packings of soft spheres.
- R. Dreyfus, Ye Xu, T. Still, L. Hough, A. Yodh, S. Torquato
- Materials Science, PhysicsPhysical review. E, Statistical, nonlinear, and…
- 20 August 2014
Using video optical microscopy to study hyperuniformity phenomena in disordered two-dimensional jammed packings of soft spheres and a simple packing reconstruction algorithm that incorporates particle polydispersity to minimize the free volume, simulations show that hyper uniformity in finite-sized samples can be ascertained more accurately in direct space than in reciprocal space.
Ordered and disordered patterns in two-phase flows in microchannels.
- R. Dreyfus, P. Tabeling, H. Willaime
- Materials Science, MedicinePhysical review letters
- 11 April 2003
It is shown that wetting properties crucially control the patterns in two-phase flows of immiscible fluids in microchannels, and a lower limit for the channel sizes capable of generating well structured objects is presented.
On the dynamics of magnetically driven elastic filaments
- Marcus L. Roper, R. Dreyfus, J. Baudry, M. Fermigier, J. Bibette, H. Stone
- PhysicsJournal of Fluid Mechanics
- 24 April 2006
Following a novel realization of low-Reynolds-number swimming (Dreyfus et al., Nature, vol. 436, 2005, p. 862), in which self-assembled filaments of paramagnetic micron-sized beads are tethered to…
Simple quantitative model for the reversible association of DNA coated colloids.
- R. Dreyfus, M. E. Leunissen, +4 authors P. Chaikin
- Materials Science, ChemistryPhysical review letters
- 27 January 2009
This work investigates the reversible association of micrometer-sized colloids coated with complementary single-stranded DNA "sticky ends" as a function of the temperature and the sticky end coverage and develops a simple general model in terms of the configurational entropy loss due to binding and confinement of the tethered DNA between neighboring particles.
Emergent Hyperuniformity in Periodically Driven Emulsions.
- J. Weijs, R. Jeanneret, R. Dreyfus, D. Bartolo
- Materials Science, PhysicsPhysical review letters
- 17 April 2015
It is shown that, as opposed to equilibrium systems, the long-range nature of the hydrodynamic interactions are not required for the formation of hyperuniform patterns, thereby suggesting a robust relation between reversibility and hyper uniformity which should hold in a broad class of periodically driven materials.
- Kun-Ta Wu, Lang Feng, +4 authors P. Chaikin
- Chemistry, MedicineProceedings of the National Academy of Sciences
- 24 October 2012
The design rules for multiflavored particles are presented and it is shown that a single particle, DNA functionalized with many different “flavors,” can recognize and bind specifically to many different partners.
One-step green synthesis of gold and silver nanoparticles with ascorbic acid and their versatile surface post-functionalization
In this study, we present a rapid and efficient synthesis of metallic gold and silver nanoparticles using ascorbic acid (vitamin C), which acts both as reducing and stabilizing agent. The size of the…
DNA patchy particles.
- Lang Feng, R. Dreyfus, R. Sha, N. Seeman, P. Chaikin
- Materials Science, MedicineAdvanced materials
- 28 May 2013
A simple and effective way to make DNA patchy particles that provide direction-selective and thermoreversible interactions, and hence can lead to unique assembly protocols and structures controlled by temperature.
Switchable self-protected attractions in DNA-functionalized colloids.
This work shows how loop and hairpin formation in the DNA coatings of micrometre-sized particles gives in situ control over the inter-particle binding strength and association kinetics, making self-protected colloids a novel material that greatly extends the utility of DNA-functionalized systems, enabling more versatile, multi-stage assembly approaches.