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Chemical Sensing (chemical + sensing)

Distribution by Scientific Domains

Polymers and Materials Science	75%

Selected Abstracts

Structure,Property,Function Relationships in Nanoscale Oxide Sensors: A Case Study Based on Zinc Oxide,

ADVANCED FUNCTIONAL MATERIALS, Issue 8 2007
S. Polarz
Abstract Chemical sensing on oxide sensors is a complex phenomenon involving catalytic activity as well as electronic properties. Thus, the properties of oxide sensors are highly sensitive towards structural changes. Effects like surface area, grain size, and, in addition, the occurrence of defects give separate contributions to the current. Structure,property,function relationships can be elucidated using a combination of state-of-the-art analytical techniques. It is shown, that impurity atoms in the oxide lattice influence the performance of ZnO sensors more strongly than the other factors. [source]

Mesoscopic Au "Meatball" Particles,

ADVANCED MATERIALS, Issue 4 2008
H. Wang
Sub-micrometer meatball-like Au particles provide a very interesting mesoscopic regime in which their optical responses are determined by both the mesoscopic size and the particle's nanoscale surface roughness. The unique optical properties of these mesoscopic particles and particle arrays hold great potential in chemical sensing and spectroscopic applications. [source]

Uniform Polymeric Hollow Microcapsules with Controlled Doping Levels Fabricated under Nonreactive Conditions,

ADVANCED MATERIALS, Issue 8 2007
K. Wygladacz
A chemically nonreactive method for the fabrication of uniform core/shell fluorescent polymeric microspheres (see figure) is demonstrated with a flow apparatus. Various dyes and labeled proteins are doped into the appropriate particle phases, and an early example of chemical sensing is demonstrated. [source]

Temperature dependence of the noise amplitude in graphene and graphene oxide

PHYSICA STATUS SOLIDI - RAPID RESEARCH LETTERS, Issue 6 2009
B. R. Goldsmith
Abstract Graphene and related materials such as carbon nanotubes and graphene oxide are promising materials for future applications in chemical sensing and electronics. Electronic noise in these materials is typically very high due to the low number of carriers and the inverse dependence of 1/f noise on the number of carriers. We have investigated the changes in 1/f noise amplitude with temperature in exfoliated graphene and reduced graphene oxide devices. We show that using reduced graphene oxide results in an intriguing environmental coupling to noise amplitude. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]