Articles

Polymer-based chromophore–catalyst assemblies for solar energy conversion

The synthesis of polymer-based assemblies for light harvesting has been motivated by the multi-chromophore antennas that play a role in natural photosynthesis for the potential use in solar conversion technolo...

Authors: Gyu Leem, Benjamin D. Sherman and Kirk S. Schanze

Electrically tunable metasurface perfect absorber for infrared frequencies

We theoretically investigate a metasurface perfect absorber based on indium-tin-oxide as active material. Our design scheme relies on conventional metal–oxide–semiconductor model and the Drude model. Inducing ...

Authors: Gwanho Yoon, Sunae So, Minkyung Kim, Jungho Mun, Renmin Ma and Junsuk Rho

Analysis of contact resistance in single-walled carbon nanotube channel and graphene electrodes in a thin film transistor

In this work, we present the experimental investigation on the contact resistance of graphene/single-walled carbon nanotube (SWCNT) junction using transfer length method with the simple equivalent circuit mode...

Authors: Jinwook Baek, Travis G. Novak, Houngkyung Kim, Jinsup Lee, Byoungwook Jang, Junseok Lee and Seokwoo Jeon

Towards three-dimensional optical metamaterials

Metamaterials have opened up the possibility of unprecedented and fascinating concepts and applications in optics and photonics. Examples include negative refraction, perfect lenses, cloaking, perfect absorber...

Authors: Takuo Tanaka and Atsushi Ishikawa

Subwavelength core/shell cylindrical nanostructures for novel plasmonic and metamaterial devices

In this review, we introduce novel plasmonic and metamaterial devices based on one-dimensional subwavelength nanostructures with cylindrical symmetry. Individual single devices with semiconductor/metal core/sh...

Authors: Kyoung-Ho Kim and You-Shin No

Surface force analysis of glycine adsorption on different crystal surfaces of titanium dioxide (TiO₂)

Surface force analysis with atomic force microscope (AFM) in which a single amino acid residue was mounted on the tip apex of AFM probe was carried out for the first time at the molecular level on titanium dio...

Authors: Narangerel Ganbaatar, Kanae Imai, Taka-aki Yano and Masahiko Hara

Formation of yttria-stabilized zirconia nanotubes by atomic layer deposition toward efficient solid electrolytes

We describe a fabrication strategy for preparing yttria-stabilized zirconia nanotube (YSZ-NT) arrays embedded in porous alumina membranes by means of template-directed atomic layer deposition (ALD) technique. ...

Authors: Eunsoo Kim, Hyunchul Kim, Changdeuck Bae, Daehee Lee, Jooho Moon, Joosun Kim and Hyunjung Shin

In situ synthesis of silver nanoparticles on the surface of PDMS with high antibacterial activity and biosafety toward an implantable medical device

We developed a straightforward method to fabricate antibacterial silicon films via the in situ synthesis of silver nanoparticles (AgNPs) on a polydimethylsiloxane (PDMS) film. To grow AgNPs attached on the fil...

Authors: Joong Hyun Kim, HyeungWoo Park and Soo Won Seo

Deep tissue penetration of nanoparticles using pulsed-high intensity focused ultrasound

Recently, ultrasound (US)-based drug delivery strategies have received attention to improve enhanced permeation and retention (EPR) effect-based passive targeting efficiency of nanoparticles in vitro and in vi...

Authors: Dong Gil You, Hong Yeol Yoon, Sangmin Jeon, Wooram Um, Sejin Son, Jae Hyung Park, Ick Chan Kwon and Kwangmeyung Kim

Nanostructured porous graphene and its composites for energy storage applications

Graphene, 2D atomic-layer of sp² carbon, has attracted a great deal of interest for use in solar cells, LEDs, electronic skin, touchscreens, energy storage devices, and microelectronics. This is due to excellent ...

Authors: Pablo Ramos Ferrer, Annsley Mace, Samantha N. Thomas and Ju-Won Jeon

Silver nanoparticle-human hemoglobin interface: time evolution of the corona formation and interaction phenomenon

In this paper, we have used spectroscopic and electron microscopic analysis to monitor the time evolution of the silver nanoparticles (Ag NP)–human hemoglobin (Hb) corona formation and to characterize the inte...

Authors: A. K. Bhunia, T. Kamilya and S. Saha

Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

One-dimensional, hollow nanostructured materials are among the most promising materials for sensing applications owing to their high surface area that facilitates the adsorption of target gases. Accordingly, f...

Authors: Jae-Hyoung Lee, Jin-Young Kim, Jae-Hun Kim, Ali Mirzaei, Hyoun Woo Kim and Sang Sub Kim

Swift tuning from spherical molybdenum microspheres to hierarchical molybdenum disulfide nanostructures by switching from solvothermal to hydrothermal synthesis route

Herein, we report the synthesis of metallic molybdenum microspheres and hierarchical MoS₂ nanostructures by facile template-free solvothermal and hydrothermal approach, respectively. The morphological transition ...

Authors: Nilam Qureshi, Sudhir Arbuj, Manish Shinde, Sunit Rane, Milind Kulkarni, Dinesh Amalnerkar and Haiwon Lee

Lead-free perovskite solar cells using Sb and Bi-based A₃B₂X₉ and A₃BX₆ crystals with normal and inverse cell structures

Research of CH₃NH₃PbI₃ perovskite solar cells had significant attention as the candidate of new future energy. Due to the toxicity, however, lead (Pb) free photon harvesting layer should be discovered to replace ...

Authors: Ajay Kumar Baranwal, Hideaki Masutani, Hidetaka Sugita, Hiroyuki Kanda, Shusaku Kanaya, Naoyuki Shibayama, Yoshitaka Sanehira, Masashi Ikegami, Youhei Numata, Kouji Yamada, Tsutomu Miyasaka, Tomokazu Umeyama, Hiroshi Imahori and Seigo Ito

Rice husk-originating silicon–graphite composites for advanced lithium ion battery anodes

Rice husk is produced in a massive amount worldwide as a byproduct of rice cultivation. Rice husk contains approximately 20 wt% of mesoporous SiO₂. We produce mesoporous silicon (Si) by reducing the rice husk-ori...

Authors: Hye Jin Kim, Jin Hyeok Choi and Jang Wook Choi

ITO nanoparticles reused from ITO scraps and their applications to sputtering target for transparent conductive electrode layer

In this study, ITO nanoparticles (ITO-NPs) were reused from ITO target scraps to synthesize low cost ITO-NPs and to apply to make sputtering target for transparent conductive electrodes (TCEs). By controlling ...

Authors: Sung-Jei Hong, Sang-Hyun Song, Byeong Jun Kim, Jae-Yong Lee and Young-Sung Kim

Enhanced viscoelastic property of iron oxide nanoparticle decorated organoclay fluid under magnetic field

Stable hydrophobic nanocomposites of magnetic nanoparticles and clay are prepared by the self-assembly of magnetite (Fe₃O₄) nanoparticles on surfaces of exfoliated clay platelets. Due to the attractive interactio...

Authors: You-Hwan Son, Youngsoo Jung, Heesuk Roh and Jung-Kun Lee

Colloidal quantum dot based solar cells: from materials to devices

Colloidal quantum dots (CQDs) have attracted attention as a next-generation of photovoltaics (PVs) capable of a tunable band gap and low-cost solution process. Understanding and controlling the surface of CQDs...

Authors: Jung Hoon Song and Sohee Jeong

All-inorganic inverse perovskite solar cells using zinc oxide nanocolloids on spin coated perovskite layer

We confirmed the influence of ZnO nanoparticle size and residual water on performance of all inorganic perovskite solar cells. By decreasing the size of the ZnO nanoparticles, the short-circuit current density (J...

Authors: Naoyuki Shibayama, Hiroyuki Kanda, Shin-ichi Yusa, Shota Fukumoto, Ajay K. Baranwal, Hiroshi Segawa, Tsutomu Miyasaka and Seigo Ito

Erratum to: Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

Authors: M. P. Phaniraj, Young-Min Shin, Woo-Sang Jung, Man-Ho Kim and In-Suk Choi

Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction

Hydrogen has received significant attention as a promising future energy carrier due to its high energy density and environmentally friendly nature. In particular, the electrocatalytic generation of hydrogen f...

Authors: Bora Seo and Sang Hoon Joo

Understanding dual precipitation strengthening in ultra-high strength low carbon steel containing nano-sized copper precipitates and carbides

Low carbon ferritic steel alloyed with Ti, Mo and Cu was hot rolled and interrupt cooled to produce nano-sized precipitates of copper and (Ti,Mo)C carbides. The steel had a tensile strength of 840 MPa, an incr...

Authors: M. P. Phaniraj, Young-Min Shin, Woo-Sang Jung, Man-Ho Kim and In-Suk Choi

Squeezing effects applied in nonclassical superposition states for quantum nanoelectronic circuits

Quantum characteristics of a driven series RLC nanoelectronic circuit whose capacitance varies with time are studied using an invariant operator method together with a unitary transformation approach. In parti...

Authors: Jeong Ryeol Choi

Oxidation behavior of AlN/CrN multilayered hard coatings

We report on the oxidation behavior of AlN/CrN multilayers at 900 °C, deposited by radio frequency magnetron sputtering. It is shown that oxidation in this system is controlled by diffusion of Cr towards the s...

Authors: Darius Tytko, Pyuck-Pa Choi and Dierk Raabe

A modified squeeze equation for predicting the filling ratio of nanoimprint lithography

A numerical method using the modified squeeze model is proposed in this paper in order to overcome the limitation of the established squeeze equation and obtain filling ratios for nanoimprint lithography (NIL)...

Authors: JiHyeong Ryu, Ho Lee, Sang-Ho Lee, HyungJun Lim and JaeJong Lee

Geometric and electronic structures of monolayer hexagonal boron nitride with multi-vacancy

Hexagonal boron nitride (h-BN) is an electrical insulator with a large band gap of 5 eV and a good thermal conductor of which melting point reaches about 3000 °C. Due to these properties, much attention was gi...

Authors: Do-Hyun Kim, Hag-Soo Kim, Min Woo Song, Seunghyun Lee and Sang Yun Lee

Fabrication routes for one-dimensional nanostructures via block copolymers

Nanotechnology is the field which deals with fabrication of materials with dimensions in the nanometer range by manipulating atoms and molecules. Various synthesis routes exist for the one, two and three dimen...

Authors: Maithri Tharmavaram, Deepak Rawtani and Gaurav Pandey

Rapid and conformal coating of polymer resins by airbrushing for continuous and high-speed roll-to-roll nanopatterning: parametric quality controls and extended applications

We present a facile and scalable coating method based on controlled airbrushing, which is suitable for conformal resin coating in continuous roll-to-roll (R2R) nanoimprint lithography (NIL) process. By control...

Authors: Jae Hyuk Lee, Minho Na, Jiyeop Kim, Kangeun Yoo, Jaekyu Park, Jeong Dae Kim, Dong Kyo Oh, Seungjo Lee, Hongseok Youn, Moon Kyu Kwak and Jong G. Ok

Biomolecular engineering for nanobio/bionanotechnology

Biomolecular engineering can be used to purposefully manipulate biomolecules, such as peptides, proteins, nucleic acids and lipids, within the framework of the relations among their structures, functions and p...

Authors: Teruyuki Nagamune

A perspective on auxetic nanomaterials

Nanomaterials have recently been found to exhibit auxetic behavior, or a negative Poisson’s ratio, whereby the lateral dimensions of the material expand, rather than shrink, in response to applied tensile load...

Authors: Harold S. Park and Sung Youb Kim

Spin-polarized scanning tunneling microscopy with quantitative insights into magnetic probes

Spin-polarized scanning tunneling microscopy and spectroscopy (spin-STM/S) have been successfully applied to magnetic characterizations of individual nanostructures. Spin-STM/S is often performed in magnetic f...

Authors: Soo-hyon Phark and Dirk Sander

Angle-resolved photoemission spectroscopy for the study of two-dimensional materials

Quantum systems in confined geometries allow novel physical properties that cannot easily be attained in their bulk form. These properties are governed by the changes in the band structure and the lattice symm...

Authors: Sung-Kwan Mo

Morphology controlled synthesis of 2-D Ni–Ni₃S₂ and Ni₃S₂ nanostructures on Ni foam towards oxygen evolution reaction

Catalysts for oxygen evolution reactions (OER) are at the heart of key renewable energy technologies, and development of non-precious metal catalysts with high activity and stability remain a great challenge i...

Authors: Nitin Kaduba Chaudhari, Aram Oh, Young Jin Sa, Haneul Jin, Hionsuck Baik, Sang Gu Kim, Suk Joong Lee, Sang Hoon Joo and Kwangyeol Lee

Mechanical properties of paraformaldehyde-treated individual cells investigated by atomic force microscopy and scanning ion conductance microscopy

Cell fixation is an essential step to preserve cell samples for a wide range of biological assays involving histochemical and cytochemical analysis. Paraformaldehyde (PFA) has been widely used as a cross-linki...

Authors: Seong-Oh Kim, Joonhui Kim, Takaharu Okajima and Nam-Joon Cho

3D nanomolding and fluid mixing in micromixers with micro-patterned microchannel walls

Microfluidic devices where the microchannel walls were decorated with micro and nanostructures were fabricated using 3D nanomolding. Using 3D molded microfluidic devices with microchannel walls decorated with ...

Authors: Bahador Farshchian, Alborz Amirsadeghi, Junseo Choi, Daniel S. Park, Namwon Kim and Sunggook Park

Acoustic wave science realized by metamaterials

Artificially structured materials with unit cells at sub-wavelength scale, known as metamaterials, have been widely used to precisely control and manipulate waves thanks to their unconventional properties whic...

Authors: Dongwoo Lee, Duc Minh Nguyen and Junsuk Rho

Guiding osteogenesis of mesenchymal stem cells using carbon-based nanomaterials

In the field of regenerative medicine, stem cells are highly promising due to their innate ability to generate multiple types of cells that could replace/repair damaged parts of human organs and tissues. It ha...

Authors: Ee-Seul Kang, Da-Seul Kim, Intan Rosalina Suhito, Sung-Sik Choo, Seung-Jae Kim, Inbeom Song and Tae-Hyung Kim

Tunable random lasing behavior in plasmonic nanostructures

Random lasing is desired in plasmonics nanostructures through surface plasmon amplification. In this study, tunable random lasing behavior was observed in dye molecules attached with Au nanorods (NRs), Au nano...

Authors: Ashish Yadav, Liubiao Zhong, Jun Sun, Lin Jiang, Gary J. Cheng and Lifeng Chi

InGaN-based photoanode with ZnO nanowires for water splitting

The water splitting properties of InGaN photoanodes equipped with ZnO nanowires were examined in this study. Over the solar spectrum range, the absorbance exhibited a remarkable increase due to the enhanced li...

Authors: Junjie Kang, Vinhquang Dang, Hongjian Li, Sungjin Moon, Panpan Li, Yangdoo Kim, Chaehyun Kim, Hakjong Choi, Zhiqiang Liu and Heon Lee

Locally placed nanoscale gold islands film within a TiO₂ photoanode for enhanced plasmon light absorption in dye sensitized solar cells

As metal nanostructures demonstrated extraordinary plasmon resonance, their optical characteristics have widely been investigated in photo-electronic applications. However, there has been no clear demonstratio...

Authors: Taeheon Kim, Yogeenth Kumaresan, Sung Jun Cho, Chang-Lyoul Lee, Heon Lee and Gun Young Jung

The use of nanocrystal quantum dot as fluorophore reporters in molecular beacon-based assays

The utilization of molecular beacon (MB) biosensor probes to detect nucleic acid targets has received enormous interest within the scientific community. This interest has been stimulated by the operational qua...

Authors: Oluwasesan Adegoke and Enoch Y. Park

Accurate extraction of WSe2 FETs parameters by using pulsed I-V method at various temperatures

This work investigates the intrinsic characteristics of multilayer WSe₂ field effect transistors (FETs) by analysing Pulsed I-V (PIV) and DC characteristics measured at various temperatures. In DC measurement, un...

Authors: Sung Tae Lee, In Tak Cho, Won Mook Kang, Byung Gook Park and Jong-Ho Lee

Current achievements of nanoparticle applications in developing optical sensing and imaging techniques

Metallic nanostructures have recently been demonstrated to improve the performance of optical sensing and imaging techniques due to their remarkable localization capability of electromagnetic fields. Particula...

Authors: Jong-ryul Choi, Dong-Myeong Shin, Hyerin Song, Donghoon Lee and Kyujung Kim

Mechanical test method and properties of a carbon nanomaterial with a high aspect ratio

Superior nanomaterials have been developed and applied to many fields, and improved characteristic of nanomaterials have been studied. Measurement of the mechanical properties for nanomaterials is important to...

Authors: Sang Koo Jeon, Hoon-Sik Jang, Oh Heon Kwon and Seung Hoon Nahm

Progress and challenges of the bioartificial pancreas

Pancreatic islet transplantation has been validated as a treatment for type 1 diabetes since it maintains consistent and sustained type 1 diabetes reversal. However, one of the major challenges in pancreatic i...

Authors: Patrick T. J. Hwang, Dishant K. Shah, Jacob A. Garcia, Chae Yun Bae, Dong-Jin Lim, Ryan C. Huiszoon, Grant C. Alexander and Ho-Wook Jun

Recent advances in M13 bacteriophage-based optical sensing applications

Recently, M13 bacteriophage has started to be widely used as a functional nanomaterial for various electrical, chemical, or optical applications, such as battery components, photovoltaic cells, sensors, and op...

Authors: Inhong Kim, Jong-Sik Moon and Jin-Woo Oh

The nanomaterial toolkit for neuroengineering

There is a growing interest in developing effective tools to better probe the central nervous system (CNS), to understand how it works and to treat neural diseases, injuries and cancer. The intrinsic complexit...

Authors: Shreyas Shah

Design, challenge, and promise of stimuli-responsive nanoantibiotics

Over the past few years, there have been calls for novel antimicrobials to combat the rise of drug-resistant bacteria. While some promising new discoveries have met this call, it is not nearly enough. The majo...

Authors: Julius A. Edson and Young Jik Kwon

Priming nanoparticle-guided diagnostics and therapeutics towards human organs-on-chips microphysiological system

Nanotechnology and bioengineering have converged over the past decades, by which the application of multi-functional nanoparticles (NPs) has been emerged in clinical and biomedical fields. The NPs primed to de...

Authors: Jin-Ha Choi, Jaewon Lee, Woojung Shin, Jeong-Woo Choi and Hyun Jung Kim

Multidimensional nanomaterials for the control of stem cell fate

Current stem cell therapy suffers low efficiency in giving rise to differentiated cell lineages, which can replace the original damaged cells. Nanomaterials, on the other hand, provide unique physical size, su...

Authors: Sy-Tsong Dean Chueng, Letao Yang, Yixiao Zhang and Ki-Bum Lee