A single-channel microparticle sieve based on Brownian ratchets.
نویسندگان
چکیده
We present a novel device for the separation of microparticles in a single channel, which is made of inversely asymmetric Brownian ratchets. It enables separation into two different fractions with an adjustable threshold and can be modeled with good agreement. This device serves as proof of concept for an extremely compact class of microsieves.
منابع مشابه
Brownian ratchets: molecular separations in lipid bilayers supported on patterned arrays.
Brownian ratchets use a time-varying asymmetric potential that can be applied to separate diffusing particles or molecules. A new type of Brownian ratchet, a geometrical Brownian ratchet, has been realized. Charged, fluorescently labeled phospholipids in a two-dimensional fluid bilayer were driven in one direction by an electric field through a two-dimensional periodic array of asymmetric barri...
متن کاملC2lc21089d 1238..1241
Fig. 1 Schematic top view on the channel separator, showing a full separation cycle. A periodically inverting external force Fext drags two diffusive particles featuring different drift velocities in the y-direction, starting from the small saw teeth. Possible diffusion paths are schematically depicted. Channel width d, large sawtooth length L, and profile amplitudes h and h/2 are indicated. Th...
متن کامل] 2 5 M ar 1 99 8 Efficiency of Brownian Motors
The efficiency of different types of Brownian motors is calculated analytically and numerically. We find that motors based on flashing ratchets present a low efficiency and an unavoidable entropy production. On the other hand, a certain class of motors based on adi-abatically changing potentials, named reversible ratchets, exhibit a higher efficiency and the entropy production can be arbitraril...
متن کاملBrownian motion and gambling: from ratchets to paradoxical games
Two losing gambling games, when alternated in a periodic or random fashion, can produce a winning game. This paradox has been inspired by certain physical systems capable of rectifying fluctuations: the so-called Brownian ratchets. In this paper we review this paradox, from Brownian ratchets to the most recent studies on collective games, providing some intuitive explanations of the unexpected ...
متن کاملNew paradoxical games based on brownian ratchets
Based on Brownian ratchets, a counterintuitive phenomenon has recently emerged-namely, that two losing games can yield, when combined, a paradoxical tendency to win. A restriction of this phenomenon is that the rules depend on the current capital of the player. Here we present new games where all the rules depend only on the history of the game and not on the capital. This new history-dependent...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Lab on a chip
دوره 12 7 شماره
صفحات -
تاریخ انتشار 2012