A Microneedle Functionalized with Polyethyleneimine and Nanotubes for Highly Sensitive, Label-Free Quantification of DNA

• Published in: Sensors (Basel, Switzerland) Vol. 17; no. 8; p. 1883
• Main Authors: Saadat-Moghaddam, Darius, Kim, Jong-Hoon
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 16.08.2017; MDPI
• Subjects: amperometric sensors; carbon nanotubes; Deionization; Deoxyribonucleic acid; DNA; Electrical properties; Error detection; Fluorescence; Human error; Lithography; Nanotubes; Polyethyleneimine; Sensitivity; carbon nanotubes; polyethyleneimine; amperometric sensors; DNA

The accurate measure of DNA concentration is necessary for many DNA-based biological applications. However, the current methods are limited in terms of sensitivity, reproducibility, human error, and contamination. Here, we present a microneedle functionalized with polyethyleneimine (PEI) and single-...