Method for nano-dripping 1D, 2D or 3D structures on a substrate

Abstract

A method for the production of nano- or microscaled 1D, 2D and / or 3D depositions from an solution (6), by means of a liquid reservoir (2) for holding the ink with an outer diameter (3,D) of at least 50 nm, is proposed, wherein there is provided an electrode (7,8 or 9) in contact with said ink (6) in said capillary (2), and wherein there is a counter electrode in and / or on and / or below and / or above a substrate (15) onto which the depositions are to be produced, including the steps of: i) keeping the electrode (7, 8, 9) and the counter electrode (15, 18) on an essentially equal potential; ii) establishing a potential difference between the electrode (7, 8, 9) and the counter electrode (15, 18) leading to the growth of an ink meniscus (1) at the nozzle (3) and to the ejection of droplets (13) at this meniscus with a homogeneous size smaller than the meniscus size (11) at a homogenous ejection frequency; keeping the voltage applied while the continuously dried droplets leave behind the dispersed material which leads a structure to emerge with essentially the same diameter as a single droplet, wherein the distance between the substrate (1) and the nozzle (3) is smaller than or equal to 20 times the meniscus diameter at least at the moment of nano-droplet ejection (12); wherein the conductivity of the ink (6) is high enough to stabilize the liquid meniscus during droplet ejection

Description

technical field [0001] The present invention relates to a method for producing 1D, 2D and / or 3D deposits from a liquid loaded with nanoparticles or other solid-phase nanocompounds stably dispersed in a solvent using a nozzle-tip vessel for holding the liquid, wherein in said The nozzle or at the container is provided with an electrode in contact with the liquid, and wherein a counter electrode is present in and / or on and / or below and / or above the substrate on which the deposit is to be produced. Background technique [0002] The controlled and spatially resolved deposition of colored liquids on surfaces is of interest in a large number of different fields, in particular in the field of printing, for the production of microdevices (printed electronics), especially flexible devices. Conductor traces or other functional entities, and in the field of biological and / or chemical detection and substance / sample processing, for the fabrication of photonic devices (such as photonic cr...

AI Technical Summary

Problems solved by technology

Furthermore, neither dots nor 3D structures have been reported to be printed with very high localization accuracy just below 100 nm.

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