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Retinal-modified SAM-coated nanoslit array thin gold film was used for ultra-sensitive (picomolar) detection of a ligand protein (β-Lactoglobulin) with a transmission SPR mode. The transmission spectra of nanoslit arrays with varying periods were evaluated for nanostructure optimization with respect to primary peak position, shape and sensitivity. Sensitivity of this method, as measured in water,...
We present a broadly-applicable nanodeposition tool, the Nanofountain Probe, for direct-write fabrication of functional nanostructures using liquid molecular ??inks??. Examples of nanopatterning of biomolecules, catalysts for subsequent nanostructure growth, and functional nanoparticle arrays for nanosystems fabrication and single cell studies will be presented. Recent developments in the use of the...
We present a microfabricated electrochemical probe (EP) designed for the detection of biomolecules released by dissociated cells and which is operated on an inverted microscope with real time imaging. The characteristics of the EP are (i) a geometry with a flat, blunt tip that is 200 mum wide, and (ii) two nanoelectrodes that are 200 nm thick, 30 mum long, and spaced 30 mum from one another. The two...
We present high aspect ratio triangular silver nanoplates (TSNP) as the first highly sensitive localized surface plasmon (LSPR) solution phase ensemble nanostructures. The LSPR and LSPR sensitivity are easily tunable throughout visible and near-infrared biosensing relevant wavelengths. The dependence of the LSPR dielectric sensitivity upon the TSNP structural parameters has been examined in detail...
An optical biosensor based on gold nanohole arrays was developed using a new nanosphere lithography technique. A vertical deposition method was used to deposit multilayers of a polystyrene (PS) - gold composite on a silanized glass substrate. The SEM images have shown that the gold nanohole and nanoring arrays are distributed uniformly on the substrate. The sensitivity of the gold surface plasmon...
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