Zobrazeno 1 - 10
of 657
pro vyhledávání: '"Keyser, Ulrich F"'
Autor:
Zheng, Fei, Suma, Antonio, Maffeo, Christopher, Chen, Kaikai, Alawami, Mohammed, Sha, Jingjie, Aksimentiev, Aleksei, Micheletti, Cristian, Keyser, Ulrich F
The transport of DNA polymers through nanoscale pores is central to many biological processes, from bacterial gene exchange to viral infection. In single-molecule nanopore sensing, the detection of nucleic acid and protein analytes relies on the pass
Externí odkaz:
http://arxiv.org/abs/2407.16290
Autor:
Thorneywork, Alice L., Gladrow, Jannes, Keyser, Ulrich F., Cates, Michael E., Adhikari, Ronojoy, Kappler, Julian
Recent experiments have probed the relative likelihoods of trajectories in stochastic systems by observing survival probabilities within a tube of radius $R$ in spacetime. We measure such probabilities here for a colloidal particle in a corrugated ch
Externí odkaz:
http://arxiv.org/abs/2402.01559
We demonstrate a non-stereoscopic, video-based particle tracking system with optical tweezers to study fluid flow in 3D in the vicinity of glass nanopores. In particular, we used the Quadrant Interpolation algorithm to extend our video-based particle
Externí odkaz:
http://arxiv.org/abs/2112.04938
Autor:
Knowles, Stuart F, Weckman, Nicole E, Lim, Vincent J, Bonthuis, Douwe J, Keyser, Ulrich F, Thorneywork, Alice L
Publikováno v:
Phys. Rev. Lett. 127, 137801 (2021)
Modification of surface properties by polymer adsorption is a widely used technique to tune interactions in molecular experiments such as nanopore sensing. Here, we investigate how the ionic current noise through solid-state nanopores reflects the ad
Externí odkaz:
http://arxiv.org/abs/2012.00884
Publikováno v:
Phys. Rev. X 11, 031022 (2021)
For diffusive stochastic dynamics, the probability to observe any individual trajectory is vanishingly small, making it unclear how to experimentally validate theoretical results for ratios of path probabilities. We provide the missing link between t
Externí odkaz:
http://arxiv.org/abs/2006.16820
Publikováno v:
Nature communications 10 (1), 1-9 (2019)
While Kramers' rates have been studied for almost a century, the transition path time between states has only recently received attention. Transition paths between different energy levels are expected to be indistinguishable in shape and have equal u
Externí odkaz:
http://arxiv.org/abs/2006.00805
Publikováno v:
Proc Natl Acad Sci (USA) 117, no. 3, 1383 (2020)
Brownian escape is key to a wealth of physico-chemical processes, including polymer folding, and information storage. The frequency of thermally activated energy barrier crossings is assumed to generally decrease exponentially with increasing barrier
Externí odkaz:
http://arxiv.org/abs/1912.08071
Publikováno v:
Phys. Rev. Lett. 123, 014502 (2019)
Nonlinear field dependence of electrophoresis in high fields has been investigated theoretically, yet experimental studies have failed to reach consensus on the effect. In this work, we present a systematic study on the nonlinear electrophoresis of h
Externí odkaz:
http://arxiv.org/abs/1907.04278
Publikováno v:
Appl. Phys. Lett. 115, 113702 (2019)
We present our findings on the changes to electroosmotic flow outside glass nanopores with respect to the choice of Group 1 cation species. In contrast with standard electrokinetic theory, flow reversal was observed for all salts under a negative dri
Externí odkaz:
http://arxiv.org/abs/1906.09511
The translocation of double-stranded DNA through a solid-state nanopore may either decrease or increase the ionic current depending on the ionic concentration of the surrounding solution. Below a certain crossover ionic concentration, the current cha
Externí odkaz:
http://arxiv.org/abs/1905.13432