Facile fabrication of a single-particle platform with high throughput via substrate surface potential regulated large-spacing nanoparticle assembly

Nanodevices based on the single nanoparticle represent innovative and promising technology, which could satisfy the increasing requirements of high accuracy, low energy consumption, and small volume. However, the acquisition of single particles involves complex operation, and the corresponding nanodevices display low-throughput. Herein, we present a facile strategy to construct a single-particle platform with high throughput via substrate surface potential modulated a large-area and large-spacing nanoparticle assembly. Such platform not only avoids optic interference but also ensures the independent electrically conductive channel of single particle on substrate. Therefore, the dark-field microscopic imaging and single-particle scattering signals collecting of individual nanoparticles with plasmonic effect are satisfactory achieved based on the platform, and the first success in the fabrication of nano-organic-light-emitting-diodes with single nanoparticle resolution in nanoscale. All the results indicate that the strategy may find promising applications in the in situ single-particle research such as single-particle detection, single-particle catalysis, and optoelectronics.