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Search Publications by: Thomas A. Germer (Fed)

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Displaying 126 - 150 of 197

Size-Monodisperse Metal Nanoparticles Via Hydrogen-Free Spray Pyrolysis

April 3, 2002
Author(s)
Jung Hyeun Kim, Thomas A. Germer, George Mulholland, S H. Ehrman
Pure copper nanoparticles were produced using a co-solvent approach avoiding use of hydrogen or other reducing gas. Compared with the particles formed without the co-solvent, the addition of alcohol has a significant effect in preventing oxidation, which

Colorimetric Characterization of Pearlescent Coatings

January 1, 2002
Author(s)
Maria E. Nadal, Thomas A. Germer
This paper descirbes recent developments at the National Institution of Standards and Technology in the colorimetric characterization of pearlescent coatings. The goal of this research is to develop standard measurement protocols for the accurate color

Polarized Light Scattering From Metallic Particles on Silicon Wafers

December 1, 2001
Author(s)
Jae H. Kim, S H. Ehrman, George W. Mulholland, Thomas Germer
Polarized light scattering by monodisperse copper and gold spheres, having diameters ranging from 96 nm to 205 nm deposited on silicon substrates were measured using visible light. The results are compared to an exact theory for scattering by a sphere on a

SCATMECH: Polarized Light Scattering C++ Class Library (Version 2.00)

December 1, 2001
Author(s)
Thomas A. Germer
A C++ object class library has been developed to distribute models for polarized light scattering from surfaces. It is the intent of this library to allow researchers in the light scattering community to fully utilive the models described in several

Large-Angle In-Plane Light Scattering From Rough Surfaces: Comment

November 1, 2001
Author(s)
Thomas A. Germer
A recent paper by Karabacak et al., which discussed the scattering from rough surfaces in directions out of the plane of incidence, exhibited an error in the derivation of a polarization factor. An asymmetry in the scattering function for directions out of

Modeling the Appearance of Special Effect Pigment Coatings

October 1, 2001
Author(s)
Thomas A. Germer, Maria E. Nadal
Metallic and pearlescent coatings are becoming increasingly important in automotive, currency, and cosmetic applications. These coatings consist of metallic or dielectric platelets suspended in a binder, and are often applied between a pigmented underlayer

Characterizing Interfacial Roughness by Light Scattering Ellipsometry

June 1, 2001
Author(s)
Thomas A. Germer
The polarization of light scattered by oxide films thermally grown on photolithographically-generated microrough silicon surfaces was measured as functions of scattering angle. Using the predictions of first-order vector perturbation theory for scattering

Polarized Light-Scattering Measurements of Polished and Etched Steel Surfaces

July 1, 2000
Author(s)
Thomas A. Germer, T Rinder, HT Rothe
The directional dependence of the intensity and polarization of light scattered by a series of steel surfaces was measured. The samples differ by polishing procedure. Theories for light scattering from microroughness and permittivity variations are

Polarimetric BRDF in the Microfacet Model: Theory and Measurements

March 1, 2000
Author(s)
R G. Priest, Thomas Germer
A key to modeling polarimetric signatures of painted objects is the polarimetric bidirectional reflectance distribution function (BRDF). In particular, it is important to correctly capture the out-of-plane behavior of the BRDF. From the theoretical point

SCATMECH: Polarized Light Scattering C++ Class Library

March 1, 2000
Author(s)
Thomas A. Germer
A C++ object class library has been developed to distribute models for polarized light scatteringfrom surfaces. It is the intent of this library to allow researchers in the light scattering community tofully utilize the models described in several
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