Myungmo Sung

We developed single-crystal poly(3,4-ethylenedioxythiopene) (PEDOT) nanowires with ultrahigh conductivity using liquid-bridge-mediated nanotransfer printing with vapor phase polymerization. The single-crystal PEDOT nanowires are formed from 3,4-ethylenedioxythiophene (EDOT) monomers that are self-assembled and crystallized during vapor phase polymerization process within nanoscale channels of a mold having FeCl3 catalysts. These PEDOT nanowires, aligned according to the pattern in the mold, are

Densely-packed alkyl monolayers similar to those previously reported by Linford et al. 1,2 are formed by the reaction of 1-alkenes with hydrogen-terminated surfaces of both Si(111) and Si(100). The thermal behavior of these monolayers in vacuum has been studied using high-resolution electron energy loss spectroscopy. Both on Si(111) and on Si(100), the monolayers are found to be stable up to about 615 K. Desorption is signaled by a decrease in the intensity of C−H modes, accompanied by the appea

Self-assembled monolayers of alkanethiols have been formed on oxidized surfaces of polycrystalline copper. For comparison, the monolayers were formed on clean copper surfaces. X-ray photoelectron spectroscopy (XPS), contact angle analysis, ellipsometry, and gas chromatography−mass spectrometry (GC−MS) have been employed to investigate the structure, formation, and thermal behavior of these monolayers. The results indicate that the structures of the monolayers on both surfaces are similar in qual

A quantum confined transport based on a zinc oxide composite nanolayer that has conducting states with mobility edge quantization is proposed and was applied to develop multi-value logic transistors with stable intermediate states. A composite nanolayer with zinc oxide quantum dots embedded in amorphous zinc oxide domains generated quantized conducting states at the mobility edge, which we refer to as "mobility edge quantization". The unique quantized conducting state effectively restricted the

Abstract A one‐step process to generate single‐crystal organic nanowire arrays using a direct printing method (liquid‐bridge‐mediated nanotransfer molding) that enables the simultaneous synthesis, alignment, and patterning of nanowires from molecular ink solutions is reported. Using this method, many single‐crystal organic nanowires can easily be synthesized by self‐assembly and crystallization of organic molecules within the nanoscale channels of molds, and these nanowires can then be directly

A highly sensitive organic field-effect transistor (OFET)-based sensor for ammonia in the range of 0.01 to 25 ppm was developed. The sensor was fabricated by employing an array of single-crystal poly(3-hexylthiophene) (P3HT) nanowires as the organic semiconductor (OSC) layer of an OFET with a top-contact geometry. The electrical characteristics (field-effect mobility, on/off current ratio) of the single-crystal P3HT nanowire OFET were about 2 orders of magnitude larger than those of the P3HT thi

Inkjet-assisted nanotransfer printing (inkjet-NTP) facilitates spatial control of many arrays of various organic functional materials on a single substrate with a high-throughput integration process, enabling monolithic integration of various organic nanopatterns. Inkjet-NTP enables wafer-scale organic electronic circuits composed of field-effect transistors, complementary inverters, and p-n diodes, demonstrating its capability to produce a high-performance, multifunctional organic chip.

This work presents a novel barrier thin film based on an organic–inorganic nanolaminate, which consists of alternating nanolayers of self-assembled organic layers (SAOLs) and Al 2 O 3 . The SAOLs-Al 2 O 3 nanolaminated films were deposited using a combination of molecular layer deposition and atomic layer deposition techniques at 80 °C. Modulation of the relative thickness ratio of the SAOLs and Al 2 O 3 enabled control over the elastic modulus and stress in the films. Furthermore, the SAOLs-Al

A new indolocabazole derivative possessing an extended aromatic core and solubilizing long aliphatic chains effectively self-assembles and crystallizes within the nanoscale channels to form single-crystal nanowires via a direct printing method from an ink solution. Single-crystal organic nanowire transistor arrays based on the π-extended indolocarbazole derivative exhibit an excellent hole mobility of 1.5 cm² V⁻¹ s⁻¹ and outstanding environmental stability.

We present UV-ALD as a promising approach to fabricate effective gas-diffusion barrier thin films at low deposition temperature (40 °C).

Thin films not thin on the ground: The title films were grown by molecular layer deposition involving repeated sequential adsorption of diethylzinc (DEZ) and hexadiyne diol (HDD) with UV polymerization. The prepared zinc oxide cross-linked polydiacetylene films exhibited good thermal and mechanical stabilities, enhanced carrier mobility (>1.3 cm2 V−1 s), and other favorable properties owing to their 2D structures. Detailed facts of importance to specialist readers are published as ”Supporting In

The composition and structure of the n-type GaN{0001\ifmmode\bar\else\textasciimacron\fi{}}-(1\ifmmode\times\else\texttimes\fi{}1) surface of samples grown on sapphire by organometallic vapor-phase epitaxy (OMVPE) has been determined through the use of time-of-flight scattering and recoiling spectrometry (TOF-SARS), three-dimensional classical ion trajectory simulations, low-energy electron diffraction (LEED), and thermal decomposition mass spectrometry (MS). Elastic recoil detection was used to

The structure of alkylsiloxane self-assembled monolayers formed on HF-treated Si3N4 has been studied using x-ray photoelectron spectroscopy, high-resolution electron energy-loss spectroscopy, and contact angle analysis. It is shown that the monolayers are similar in quality to those formed on oxidized silicon, despite the fact that upon etching in HF, the Si3N4 surface contains only 0.2 ML of oxygen. In contrast, on NH4F-treated Si(100) surfaces with similar quantities of oxygen, high-quality mo