University of California

Fan Yang

Reginald M Penner

Rachel A Segalman

Kristin Aslaug Persson

Jeffrey J Urban

Nelson E Coates

Ayaskanta Sahu

Boris Russ

Jason D Forster

Miao Liu

Christopher Dames

This disclosure provides systems, methods, and apparatus related to surface doping of nanostructures. In one aspect a plurality of nanostructures is fabricated with a solution-based process using a solvent. The plurality of nanostructures comprises a semiconductor. Each of the plurality of nanostructures has a surface with capping species attached to the surface. The plurality of nanostructures is mixed in the solvent with a dopant compound that includes doping species. During the mixing the capping species on the surfaces of the plurality of nanostructures are replaced by the doping species. Charge carriers are transferred between the doping species and the plurality of nanostructures.

Surface doping of nanostructures

Devices and methods for fast, sensitive hydrogen gas detection using a single palladium nanowire. In one embodiment, a hydrogen sensor comprises a palladium nanowire extending between metal contacts. The palladium nanowire is not subject to fracturing when exposed to hydrogen. The nanowire is able to rapidly and reversibly detect hydrogen as a resistance increase down to 2 ppm with excellent reproducibility and baseline stability at room temperature.

Hydrogen gas detection using single palladium nanowires

Growing community of inventors

El Cerrito, CA, United States of America

Fan Yang