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(Color) Structure of APS (3-Aminopropyl) triethoxysilane (top left), surface functionalization before chemical modification (top center), and after chemical modification (top right). A schematic of the gateless HEMT whose surface is functionalized in the gate region is shown at bottom.
(Color) Fluorescent photographs of biotinylated probes on chemically treated a GaN surface (left) and nonbiotinated surface (right).
SEM micrographs of amine-functionalized GaN surfaces reacted with biotin NHS and then blocked and exposed to either streptavidin (left) or BSA-coated (right) nanoparticles.
(Color) Change in HEMT drain-source current as a result of interaction between biotin (sulfo-NHS-biotin) and streptavidine introduced to the gateless HEMT surface.
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