High current density electron emission from an electrodeposited metal nanowire array

Abstract

High-current electron field emitters are of interest for many applications, but state-of-the-art devices suffer from limitations such as high turn-on macroscopic field, low macroscopic current density, poor emission stability, and short lifetime. Field emitter arrays with a high spatial density of uniform emitters have the potential to address these problems. This work presents the process development, fabrication, and testing of a novel field emitter array. The authors employed electron beam lithography and templated electrodeposition to fabricate a high spatial density array of metallic nanowires, resulting in electron emission with high macroscopic current density (2 A/cm2) and low turn-on macroscopic field (4.35 V/μm). Templated electrodeposition of metallic nanowire arrays is a promising method for producing high performance field emitters.

Band‐to‐Band Tunneling Control by External Forces: A Key Principle and Applications

“…Thermoenhanced field emission cathode is a highly promising technology to improve the performance of field electron emitters, [ 120,149 ] which has beneficial use in the ionization vacuum gauge, low energy electron beam lithography, [ 121–125 ] and X‐rays. [ 126–130 ] On the other hand, an advanced solution to resolve the problem is required because the thermoenhanced field emission still suffers from poor temperature sensitivity or insufficient free electron density according to type of semiconductor.…”

“…Thermoenhanced field emission cathode is a highly promising technology to improve the performance of field electron emitters, [120,149] which has beneficial use in the ionization vacuum gauge, low energy electron beam lithography, [121][122][123][124][125] and X-rays. [126][127][128][129][130] On the other hand, an advanced solution to Reproduced with permission.…”

Control of the asymmetric growth of nanowire arrays with gradient profiles

“…Furthermore, by varying the reduction potential over time in a controlled way, it also leads to changes in the morphology of μHGPs. The proposed methodology in this work allows the synthesis of novel spatially modulated 3D microstructures based on NW building blocks, which are interesting for potential applications as site-selective application of electric potentials, 21 non-reciprocal microwave absorption, 30 electron field emission, 42 and super-capacitive device applications. 43 Furthermore, the morphology of the proposed μHGPs may also be interesting for energy conversion, 44 optoelectrical, 45 and thermoelectric energy conversion 46 applications that take advantage of NWs length-dependent properties.…”