정택동 교수

Physical and electrochemical features of nanoporous electrodes arising from their morphology are presented in this perspective. Although nanoporous electrodes have been used to enhance electrocatalysis for several decades, the origin of their capability was understood on the basis of enlarged surface area or crystalline facet. However, considerable attention should be paid to the fact that nano-confined space of nanoporous electrodes can significantly affect electrochemical efficiency. Molecular

A simple method that uses graphene to fabricate nanotopographic substrata was reported for stem cell engineering. Graphene-incorporated chitosan substrata promoted adhesion and differentiation of human mesenchymal stem cells (hMSCs). In addition, we proposed that nanotopographic cues of the substrata could enhance cell-cell and cell-material interactions for promoting functions of hMSCs.

This article provides an overview of recent research achievements in miniaturized flow cytometry. The review focuses on chip-based microfluidic flow cytometers, classified by cell transport method, detection technology, and biomedical application. By harnessing numerous ideas and cutting-edge microfabrication technologies, microfluidic flow cytometry benefits from ever-increasing functionalities and the performance levels achieved make it an attractive biomedical research and clinical tool. In t

Analytical applications and the underlying principles of unique electrochemistry in nanoporous structures are reviewed and discussed. In addition to the conventional concept of enlarged surface area, the structural effects of nanoporous materials can play significant roles such as discriminative electrokinetics, the nano-confinement effect, electrical double layer overlapping, ion-selective impedance, etc. The applications described in this review article include solid-state pH sensors, miniatur

We have devised a unique method for sensitive and selective detection of Hg(2+) ions using DNA-modified gold microshells which can be individually manipulated using a micropipette and act as a micro SERS probe for analysis in small sample volumes.

The highly selective electrochemical reduction of carbon dioxide (CO 2 ) is reported to formate (HCOO ‐ ) at a compactly integrated bioelectrode. The enzymatic biocatalytic cathode is fabricated by single‐step electropolymerization of a multifunctional polydopamine film in which enzyme/cofactor couples are uniquely embedded. Interestingly, this thin biohybrid system of nanoscale thickness assures unprecedentedly prolonged catalytic enzyme stability for about two weeks. Mimicking the natural phot

Color generation based on strategically designed plasmonic nanostructures is a promising approach for display applications with unprecedented high-resolution. However, it is disadvantageous in that the optical response is fixed once the structure is determined. Therefore, obtaining high modulation depth with reversible optical properties while maintaining its fixed nanostructure is a great challenge in nanophotonics. In this work, dynamic color tuning and switching using tungsten trioxide (WO<su

Reduced graphene oxide (rGO) films are decorated with non‐overlapping Au nanoparticles using diblock copolymer micelles that provide controllability over the number density as well as the diameter of the nanoparticles. This synthetic process produces a pure Au surface without extra layers. Further­more, the rGO film enables the transferability of the Au nanoparticles without deterioration of their arrays. Thus, the controllability of the Au nanoparticles and their transferability with rGO films

Quantification of circulating tumor cells (CTCs) in blood samples is believed to provide valuable evidence of cancer progression, cancer activity status, response to therapy in patients with metastatic cancer, and possible cancer diagnosis. Recently, a number of researchers reported that CTCs tend to lose their epithelial cell adhesion molecule (EpCAM) by an epithelial-mesenchymal transition (EMT). As such, label-free CTC detection methods are attracting worldwide attention. Here, we describe a