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Colloidal Quantum Dot Nanolithography: Direct Patterning via Electron Beam Lithography
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Colloidal Quantum Dot Nanolithography: Direct Patterning via Electron Beam Lithography
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Journal Article
Colloidal Quantum Dot Nanolithography: Direct Patterning via Electron Beam Lithography
2023
Overview
Micro/nano patterns based on quantum dots (QDs) are of great interest for applications ranging from electronics to photonics to sensing devices for biomedical purposes. Several patterning methods have been developed, but all lack the precision and reproducibility required to fabricate precise, complex patterns of less than one micrometer in size, or require specialized crosslinking ligands, limiting their application. In this study, we present a novel approach to directly pattern QD nanopatterns by electron beam lithography using commercially available colloidal QDs without additional modifications. We have successfully generated reliable dot and line QD patterns with dimensions as small as 140 nm. In addition, we have shown that using a 10 nm SiO2 spacer layer on a 50 nm Au layer substrate can double the fluorescence intensity compared to QDs on the Au layer without SiO2. This method takes advantage of traditional nanolithography without the need for a resist layer.
Publisher
MDPI AG,MDPI
