Browsing by Subject "CHAINS"
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Item Open Access Self-Assembling DNA templates for programmed artificial biomineralization(Soft Matter, 2011-05-16) Samano, Enrique C; Pilo-Pais, Mauricio; Goldberg, Sarah; Vogen, Briana N; Finkelstein, Gleb; LaBean, Thomas HComplex materials with micron-scale dimensions and nanometre-scale feature resolution created via engineered DNA self-assembly represent an important new class of soft matter. These assemblies are increasingly being exploited as templates for the programmed assembly of functional inorganic materials that have not conventionally lent themselves to organization by molecular recognition processes. The current challenge is to apply these bioinspired DNA templates toward the fabrication of composite materials for use in electronics, photonics, and other fields of technology. This highlight focuses on methods we consider most useful for integration of DNA templated structures into functional composite nanomaterials, particularly, organization of preformed nanoparticles and metallization procedures. © The Royal Society of Chemistry 2011.Item Open Access Transport signatures of Majorana quantum criticality realized by dissipative resonant tunneling(Physical Review B - Condensed Matter and Materials Physics, 2014-06-27) Zheng, H; Florens, S; Baranger, HUWe consider theoretically the transport properties of a spinless resonant electronic level coupled to strongly dissipative leads, in the regime of circuit impedance near the resistance quantum. Using the Luttinger liquid analogy, one obtains an effective Hamiltonian expressed in terms of interacting Majorana fermions, in which all environmental degrees of freedom (leads and electromagnetic modes) are encapsulated in a single fermionic bath. General transport equations for this system are then derived in terms of the Majorana T-matrix. A perturbative treatment of the Majorana interaction term yields the appearance of a marginal, linear dependence of the conductance on temperature when the system is tuned to its quantum critical point, in agreement with recent experimental observations. We investigate in detail the different crossovers involved in the problem, and analyze the role of the interaction terms in the transport scaling functions. In particular, we show that single barrier scaling applies when the system is slightly tuned away from its Majorana critical point, strengthening the general picture of dynamical Coulomb blockade. © 2014 American Physical Society.