BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT UID:d606a9469e3b7a2fc588c7368a90f11a CATEGORIES:Physical Chemistry Seminar CREATED:20210226T180919 SUMMARY:Dr. Sophie Marbach, Courant Institute at NYU and Sorbonne University DESCRIPTION:The Nanoscale Caterpillar: or how to achieve precise motion with random sti cky feet\nParticles with sticky feet – or nanoscale caterpillars – in biolo gical or artificial systems, beat the paradigm of standard diffusion to ach ieve complex functions. Some cells (like leucocytes) use ligand-receptor co ntacts (sticky feet) to crawl and roll along vessels. Sticky DNA (another t ype of sticky feet) is coated on colloids to design programmable interactio ns and self-assembly. Predicting the dynamics of such sticky motion is chal lenging since sticky events (attaching/detaching) often occur on very short time scales compared to the overall motion of the particle. Even understan ding the equilibrium statistics of these systems (how many feet are attache d in average) is largely uncharted. Yet, controlling the dynamics of such p articles is critical to achieve these advanced functions -- for example fac ilitating rolling is critical for long-range alignment of DNA coated-colloi ds crystals. Here we present advanced theory and experimental results on a model system. We rationalize what parameters control average feet attachmen t and how they can be compared to other existing systems. We investigate fu rthermore how various motion modes (rolling, sliding or skipping) may be fa vored over one another.\nHosted by Professor Richard Remsing\nFor WebEx mee ting information, please contact Loretta Lupo @ (mailto:lal275@chem.rutger s.edu)This email address is being protected from spambots. You need JavaScr ipt enabled to view it.\n X-ALT-DESC;FMTTYPE=text/html:
The Nanoscale Caterpillar: or how to achieve precise motion with random sti cky feet
Particles with sticky feet – or nanoscale caterpillars – in biologi cal or artificial systems, beat the paradigm of standard diffusion to achieve complex functions. Some cells (like leucocytes) use ligand-rec eptor contacts (sticky feet) to crawl and roll along vessels. Sti cky DNA (another type of sticky feet) is coated on colloids to design programmable interactions and self-assembly. Predicting the dynamics o f such sticky motion is challenging since sticky events (attaching/det aching) often occur on very short time scales compared to the overall motio n of the particle. Even understanding the equilibrium statistics of these s ystems (how many feet are attached in average) is largely uncharted. Yet, c ontrolling the dynamics of such particles is critical to achieve these adva nced functions -- for example facilitating rolling is critical for long-ran ge alignment of DNA coated-colloids crystals. Here we present advanced theo ry and experimental results on a model system. We rationalize what paramete rs control average feet attachment and how they can be compared to other ex isting systems. We investigate furthermore how various motion modes (rollin g, sliding or skipping) may be favored over one another.
Host ed by Professor Richard Remsing
For WebEx meeting informatio
n, please contact Loretta Lupo @