Other

Korea Advanced Institute of Science and Technology

Korea Institute of Machinery & Materials

Dae Hwan Jung

Sang Yup Lee

Young Koan Ko

Hee Tae Jung

Byung Hun Kim

Do Hyun Kim

Seok Jae Lee

Jung Hyun Noh

Hyun Eui Lim

Wan Doo Kim

Jae Shin Lee

A super water repellent surface is prepared by arranging plural spherical beads on a substrate surface to form a (N)-th bead layer, etching the substrate surface with the (N)-th bead layer as an etching mask, arranging plural spherical beads, which are larger than the (N)-th beads in diameter, on the substrate surface to form a (N+1)-th bead layer, etching the substrate surface with the (N+1)-th bead layer as an etching mask, removing the beads from the etched substrate surface and coating a fluorine compound on the substrate surface on which a hierarchical concavo-convex structure has been formed. The (N+1)-th bead layer forming step and the (N+1)-th etching step are repeated N times.

Preparation of super water repellent surface

Carbon nanotube (CNT) films, patterns and biochips and methods of making the same are provided. Such a biochip comprises a bio-receptor attached by means of an exposed chemical functional group on a surface of a high density CNT film or pattern produced by repeated lamination of CNTs on a substrate with exposed amine groups. Various types of CNT-biochips may be fabricated by bonding of bio-receptors to a CNT pattern (or film) containing exposed carboxyl groups or modified by various chemical functional groups. Further, the CNT-biochip may be used to measure an electrical or electrochemical signal using both conductor and semiconductor properties of the CNT, thereby not needing labeling. Upon fluorescent measurement of DNA hybridization using such a CNT-DNA chip it is possible to show more distinct signals useful for genotyping, mutation detection, pathogen identification and the like.

Method for fabricating a biochip using the high density carbon nanotube film or pattern

Conductive carbon nanotubes (CNTs) obtained by dotting carboxylated CNTs with metal nanocrystals by chemical functional groups, are described, as well as a method for fabricating a pattern or film of the conductive CNTs which involves repeatedly depositing conductive CNTs on a substrate to achieve high surface density. A biosensor is described, in which bioreceptors that bind to target biomolecules are selectively attached to conductive CNTs or a conductive CNT pattern or film. By use of the conductive biosensor, various target biomaterials that bind or react with the bioreceptors can be precisely measured directly or by electrochemical signals at large amounts in one step. Additionally, the biosensor can be used for an electrical detection method capable of providing precise measurement results even with a small amount of source material.

Conductive carbon nanotubes dotted with metal and method for fabricating a biosensor using the same

Growing community of inventors

Daejeon, South Korea

Dae Hwan Jung