Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Jane F. Bertone"'
Publikováno v:
Nano Letters. 3:655-659
This paper describes for the first time a chemical method for the preparation for nanocrystalline quartz. Submicron quartz powders are initially produced in hydrothermal reactions where soluble silica precursors precipitate as pure crystalline silica
Publikováno v:
Science. 291:453-457
We report a nanoscale “lost-wax” method for forming colloids with size distributions around 5% and their corresponding colloidal crystals. Macroporous polymer templates are first prepared from a silica colloidal crystal. We then use the uniform a
Publikováno v:
Journal of the American Chemical Society. 121:11630-11637
The fabrication of polymeric materials with ordered submicron-sized void structures is potentially valuable for many separation technologies as well as for emerging optical applications. This paper reports the preparation of macroporous polymer membr
Publikováno v:
Chemistry of Materials. 11:2132-2140
Materials whose dielectric constant varies spatially with submicrometer periodicity exhibit diffractive optical properties which are potentially valuable in a number of existing and emerging applications. Here, such systems are fabricated by exploiti
Publikováno v:
Physical Review Letters. 83:300-303
We report observations of the optical stop band of periodic planar arrays of submicron silica spheres, and of macroporous polymers grown from these silica templates. The stop-band width and peak attenuation depend on the number of layers and on the d
Publikováno v:
The Journal of Chemical Physics. 111:345-354
We present a quantitative comparison between two analytic theories for the propagation of electromagnetic waves in periodic dielectric structures. These theories have both been used extensively in the modeling of optical spectra of colloidal crystals
Publikováno v:
ChemInform. 30
Publikováno v:
SPIE Proceedings.
One approach to CBRNE detection is analytical monitoring with portable spectroscopy systems. Such a technique needs to work in adverse environments, be amenable to use by field operators, and, given the sensitive nature of the target materials, shoul
Publikováno v:
SPIE Proceedings.
Surface-enhanced Raman scattering (SERS) is emerging as a versatile and powerful technique for the detection of various defense related hazardous materials. This work illustrates the level of sensitivity and reproducibility achieved using SERS substr
Publikováno v:
Chemical and Biological Point Sensors for Homeland Defense.
Surface-enhanced Raman spectroscopy (SERS) is a spectroscopic technique that enables trace detection of analytes of relevance using fieldable equipment. SERS uses the enhanced Raman signals observed when an analyte adsorbs to a roughened metal substr