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We have analyzed the growth allometry of external body proportions in Efe pygmies from Zaire and combined these data with values from the literature for comparable dimensions in adult pygmies and nonpygmies. We sequentially tested the hypotheses that adult proportion differences between 1) male vs. female Efe, and 2) pygmies vs. nonpygmies result from(More)
In this work, we demonstrate improved molecular detection sensitivity for silicon slab photonic crystal cavities by introducing multiple-hole defects (MHDs), which increase the surface area available for label-free detection without degrading the quality factor. Compared to photonic crystals with L3 defects, adding MHDs into photonic crystal cavities(More)
We report the synthesis of new " branched " gold nanocrystals in high yield (over 90%) via a wet-chemical route. The branched nanocrystals exhibit a shape-dependent plasmon resonance that is red-shifted by 130−180 nm from the spherical particle wavelength. Discrete dipole approximation (DDA) calculations qualitatively replicate the observed optical(More)
We present a combination of theory and experiment designed to elucidate the properties of gold nanoshells. Wet chemistry methods are used to prepare the nanoshells, and transmission electron microscopy (TEM) analysis is used to characterize the shell structure, demonstrating the presence of pinholes in the shells. Both Mie theory and the discrete dipole(More)
In this paper, we introduce a novel approach for optical sensing based on the excitation of critically localized modes in two-dimensional deterministic aperiodic structures generated by a Rudin-Shapiro (RS) sequence. Based on a rigorous computational analysis, we demonstrate that RS photonic structures provide a large number of resonant modes better suited(More)
Micropatterning of the vapochromic charge-transfer salt, [Pt(CNC6H4C10H21)4][Pd(CN)4], on transparent platforms yields transmissive chemoresponsive diffraction gratings. Exposure of the gratings to volatile organic compounds (VOCs) such as chloroform and methanol leads to VOC uptake by the porous material comprising the grating lattice or framework, and a(More)
We report a real-time DNA detection method that utilizes single-strand DNA-modified nanoparticle probes and micropatterned chemoresponsive diffraction gratings interrogated simultaneously at multiple laser wavelengths. The surface-bound nanoparticle probe based assay with the chemoresponsive diffraction grating signal transduction scheme results in an(More)
We have utilized hybrid zinc oxide/silica microdisk lasers to sense volatile organic compounds, such as toluene and nitrobenzene. Nonspecific adsorption of these organic molecules onto the microdisk surface causes an increase in the disk refractive index, ultimately resulting in a redshift of the observed lasing wavelengths. The monitoring of these shifts(More)
Molecular squares, triangles, rectangles, and related structures , consisting of transition-metal corners and difunctional ligand edges, are the synthetic focus of a substantial segment of contemporary coordination chemistry. [1±4] The attraction of these structures, which typically feature molecule-sized cavities , is their ability to function as soluble(More)