Fig. 2: Fabrication and characterization of hybrid molecule nano-arrays.
From: Femtomolar hydrogen sulfide detection via hybrid small-molecule nano-arrays
a Schematic illustration of fabricating hybrid molecule nano-array using modified nanoxerography method, which involves surface charge writing, reversed-micelle preparation, and site-specific assembly by electrical trapping. b Electric potential map after writing a 5 × 5 charge array on the substrate. Scale bar, 5 μm. c AFM height map of the hybrid molecule nano-array, with an average height of 50 nm. Scale bar, 5 μm. d Dynamic light scattering (DLS) result of reversed-micelles, with the statistic size in dispersion around 3 nm. Inset is a photograph of the micelle dispersion in a test tube. e Scheme of the fluorescence array imaging reader. A homemade inverted widefield microscope is equipped with a fiber-coupled 532 nm continuous-wave laser diode and a sensitive Electron Multiplying Charge-Coupled Device (EMCCD) camera. f Schematic illustration of H2S detection, and corresponding PL images of the hybrid molecule array after incubation with water (10 μL) and H2S solution (10 μL, 0.1 μM). Scale bar, 5 μm.
