Review
Chemistry, Multidisciplinary
Zhimin Chai, Anthony Childress, Ahmed A. Busnaina
Summary: Nanofabrication based on directed assembly, utilizing external fields to interact with nanoelements and assemble functional structures, is attracting more interest recently due to its low cost and additive manufacturing advantages. The external fields used in directed assembly include electric, fluidic flow, magnetic, and optical fields.
Review
Engineering, Biomedical
Eduardo Anaya-Plaza, Ahmed Shaukat, Inka Lehtonen, Mauri A. Kostiainen
Summary: The strategy of combining biomolecules and synthetic components to develop biohybrids is becoming increasingly popular for preparing highly customized and biocompatible functional materials， allowing the excellent properties of carbon nanotubes (CNTs) to be applied to biomedical applications. The resulting well-defined composites of CNTs conjugated with relevant biomolecules enable the exploitation of nanoscale properties at the micro- and macroscale, with potential applications in tissue engineering, sensors, and wearable electronics. This review presents the underlying chemistry behind the CNT-based biohybrid materials and discusses the future directions of the field.
ADVANCED HEALTHCARE MATERIALS
(2021)
Review
Nanoscience & Nanotechnology
Kaiwen Zeng, Xiang Shi, Chengqiang Tang, Ting Liu, Huisheng Peng
Summary: One-dimensional fibre electronic devices are highly flexible and can be woven into breathable and comfortable textiles for wearable applications. However, most fibre devices work individually rather than as systems. This Perspective article highlights promising design concepts, assembly strategies and performance improvements for fibre electronic systems, and analyzes their real-life applications from a multidisciplinary perspective.
NATURE REVIEWS MATERIALS
(2023)
Article
Polymer Science
Zhiliang Li, Duyen K. Tran, Mary Nguyen, Tengyue Jian, Feng Yan, Samson A. Jenekhe, Chun-Long Chen
Summary: This study presents the synthesis of a novel amphiphilic diblock peptoid with a terminal conjugated oligoaniline, which self-assembles into highly crystalline nanotubes with excellent stability and conductivity. The ordered structure directed by the peptoid allows for efficient electrical transport, showcasing a promising strategy for creating complex nanostructures with useful electronic and optoelectronic properties.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Physics, Applied
S. Noparast, F. Guevara Vasquez, B. Raeymaekers
Summary: Ultrasound directed self-assembly (DSA) allows organizing particles dispersed in a fluid medium into user-specified patterns. This study experimentally measures the deviation between particle assembly locations during ultrasound DSA and derives equations that predict this deviation. The findings have implications for fabricating engineered polymer composite materials.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
John J. Cully, Jacob L. Swett, Kyle Willick, Jonathan Baugh, Jan A. Mol
Summary: The synthesis of low-dimensional materials with unique properties has opened up new possibilities for creating hybrid nanomaterial devices. However, challenges remain in integrating individual nanoparticles into devices at scale. A graphene nanogap platform has been developed to address this issue, allowing for the capture and integration of single nanoparticles for applications in novel devices and optoelectronics.
Article
Materials Science, Multidisciplinary
Laith A. Algharagholy, Hatef Sadeghi, Amaal A. Al-Backri
Summary: Covalently bonded carbon and boron nitride heteronanotubes can selectively sense trinitrotoluene and triacetone triperoxide. By creating and tuning energy band gaps in the heteronanotubes, new resonances are formed for detection purposes. The presence of different compounds leads to specific Seebeck coefficients, enabling the selective sensing of these species.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Physics, Applied
Xinzhao Xu, Zamaan Mukadam, Giuseppe Amoroso, Mark Freeley, Matteo Palma
Summary: This study demonstrates the fabrication of multiplexed single-walled carbon nanotube (SWCNT) devices with single-tube precision, where selected chiralities are separately immobilized and electrically measured. Through aqueous two-phase polymer systems and dielectrophoresis, (6,5) and (7,5) SWCNT species were isolated and precisely controlled for placement on prepatterned electrodes on a single chip.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Kalipada Koner, Shayan Karak, Sharath Kandambeth, Suvendu Karak, Neethu Thomas, Luigi Leanza, Claudio Perego, Luca Pesce, Riccardo Capelli, Monika Moun, Monika Bhakar, Thalasseril G. Ajithkumar, Giovanni M. Pavan, Rahul Banerjee
Summary: This study reports the synthesis of covalently bonded porous organic nanotubes (CONTs) with high thermal and chemical stability. Under ultrasonication, these CONTs form intertwined structures that eventually coil to form toroidal superstructures. Computational studies provide insight into the solvent effect on this assembly process.
Review
Materials Science, Multidisciplinary
Tianming Li, Kai Xiao
Summary: This article introduces the important branch of iontronics - solid-state iontronics, and reviews the working principles of various solid-state iontronic devices. Meanwhile, the prospects of developing multifunctional integrated iontronic devices and molecular iontronic devices are also discussed to meet the growing demands for intelligent products.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Pankaj Ghildiyal, Prithwish Biswas, Steven Herrera, George W. Mulholland, Yong Yang, Reza Abbaschian, Michael R. Zachariah
Summary: Gas-phase synthesis techniques offer a scalable approach to production of metal nanoparticles, but directed assembly is challenging due to fast particle diffusion rates. This study explores the use of an electromagnetic-levitation technique to generate metal nanoparticle aggregates with altered fractal properties, competing with random Brownian forces. Ferromagnetic metals form chain-like aggregates, while paramagnetic metals form compact aggregates with higher fractal dimensions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Physical
Andrey Baydin, Fuyang Tay, Jichao Fan, Manukumara Manjappa, Weilu Gao, Junichiro Kono
Summary: This article discusses the applications of carbon nanotubes in quantum technology. Carbon nanotubes possess one-dimensional electronic states, excitons, and phonons, which make them suitable for developing quantum devices with high operating temperatures. The article covers the fundamental properties of carbon nanotubes, their growth and purification methods, and methodologies for assembling them into structures that exhibit macroscopic quantum properties. Most importantly, recent developments and proposals for quantum information processing devices based on individual and assembled nanotubes are reviewed.
Article
Biochemistry & Molecular Biology
Mark Freeley, Rebecca E. A. Gwyther, D. Dafydd Jones, Matteo Palma
Summary: This study reports the controlled assembly of SWCNT-GFP hybrids using DNA as a linker, confirming GFP attachment predominantly at the terminal ends of the nanotubes. Electronic coupling of the proteins to the nanotubes was confirmed through in-solution fluorescence spectroscopy, showing an increase in the emission intensity of GFP when linked to the CNTs.
Article
Chemistry, Physical
Zan Lian, Min Yang, Faheem Jan, Bo Li
Summary: Machine learning based on high-throughput density functional theory calculations was used to establish the pattern of polysulfides adsorption and screen the supported single-atom catalyst (SAC). The adsorptions were classified into two categories distinguishing S-S bond breaking from the others, and a general trend of polysulfides adsorption regarding both kind of metal and nitrogen configurations on support was established with good predictive ability.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Biochemistry & Molecular Biology
Jacqueline A. Labra-Munoz, Arie de Reuver, Friso Koeleman, Martina Huber, Herre S. J. van der Zant
Summary: This study reports the fabrication process of single-electron devices based on horse-spleen ferritin particles, and demonstrates the significance of single-electron charge transport in ferritin through the excellent agreement between experimental data and the Coulomb blockade theory, which provides potential for further characterization and applications in electronic and medical fields.
Article
Chemistry, Physical
Tirta Rona Mayangsari, Luchana Lamierza Yusup, Romel Hidayat, Tanzia Chowdhury, Young-Kyun Kwon, Won-Jun Lee
Summary: Density functional theory calculations were used to simulate the atomic layer deposition of silicon nitride using silicon chloride, showing that the reaction with N2H4 is energetically favorable with a lower activation energy compared to NH3. In plasma-enhanced ALD processes, NH3 plasma effectively removes Cl atoms from the Si3N4 surface to form active sites for further reactions.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yongju Lee, Jaewook Shin, Hyeonmuk Kang, Daehee Lee, Tae-Hee Kim, Young-Kyun Kwon, EunAe Cho
Summary: Li-excess layered cathode (LLC) materials have high theoretical specific capacity, but oxygen redox reaction may cause irreversible oxygen release and phase transformation. Doping vanadium (V) into LLC suppresses these issues and improves capacity retention.
Article
Chemistry, Physical
Dasol Kim, Taek Sun Jung, Hanjin Park, Wonjun Yang, Jeonghwa Han, Soobin Hwang, Kyung Ik Sim, Young-Kyun Kwon, Jae Hoon Kim, Mann-Ho Cho
Summary: The study reveals that in the crystallization process of Ag-In-Sb-Te, the local environment of In transitions from InSb-like to AgInTe2-like, significantly influencing the atomic ordering and activation energy of crystallization.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Hyeong-ku Jo, Hanjin Park, Hyung-June Lee, Garam Bae, Da Som Song, Ki Kang Kim, Wooseok Song, Cheolho Jeon, Ki-Seok An, Young-Kyun Kwon, Chong-Yun Park
Summary: This study reveals the crucial role of oxygen in determining the crystal orientation of Cu foil grains. Experimental and computational methods were used to explore the correlation between oxygen content and recrystallization surface phase.
APPLIED SURFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Sohee Park, Young-Kyun Kwon, Mina Yoon, Changwon Park
Summary: In many complex oxides, the formation of oxygen vacancies can be a promising method to modify material properties. This study investigates the effects of Sr doping and external strain on the diffusivity of oxygen vacancies in LSCO. The calculations reveal that Sr doping and strain can greatly enhance the diffusivity by reducing the energy barrier for oxygen vacancies to escape from equatorial sites. However, in the case of fully compensated holes, the formation energy of apical vacancies becomes too high, leading to the trapping of most oxygen vacancies at equatorial sites.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Chang Woo Lee, Jin-Su Oh, Sun-Ho Park, Hyeon Wook Lim, Da Sol Kim, Kyu-Jin Cho, Cheol-Woong Yang, Young-Kyun Kwon, Mann-Ho Cho
Summary: This study investigates the phase-change characteristics of interfacial phase-change memory (iPCM) using atomic scale imaging, X-ray diffraction, and chemical analysis with first-principles density functional theory (DFT) calculations. The results reveal that the low-resistance state of iPCM can convert reversibly into a modified metastable face-centered cubic (fcc) GeSbTe structure in the high-resistance state. This transition is driven by rearrangement of Ge atoms and formation of ordered vacancy layers. The study provides insights into the phase-change mechanisms of iPCM and the design of phase-change random access memory with low energy and high speed.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Sangmoon Yoon, Hongmin Seo, Kyoungsuk Jin, Hyoung Gyun Kim, Seung-Yong Lee, Janghyun Jo, Kang Hee Cho, Jinseok Ryu, Aram Yoon, Young-Woon Kim, Jian-Min Zuo, Young-Kyun Kwon, Ki Tae Nam, Miyoung Kim
Summary: Understanding the chemical states and arrangements of individual surface atoms is crucial for addressing current issues such as catalysis, energy storage/conversion, and environmental protection. In this study, a profile imaging technique was used to investigate the correlation between surface atomic structures and the oxygen evolution reaction (OER) in Mn3O4 nanoparticles. It was found that surface reconstructions can deactivate low-index surfaces of Mn oxides in OER.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Hojun Gwon, Junyoung Chae, Chanwoo Jeong, Hyukjae Lee, Dong Hwi Kim, Sam Yaw Anaman, Dameul Jeong, Hoon-Hwe Cho, Young-Kyun Kwon, Sung-Joon Kim, Heung Nam Han
Summary: We discovered remarkable martensitic transformation in 16Cr-5Ni metastable austenitic stainless steel during electrochemical polishing (EP). The fraction of alpha' martensite was observed to increase as the applied voltage and EP time increased. This transformation was found to be confined to the surface where EP took place. Through calculations using COMSOL Multiphysics, it was concluded that the development of significant stress on the surface due to charge build-up induced stress-induced martensitic transformation during EP.
Article
Chemistry, Multidisciplinary
Dongsoo Jang, Chulwoo Ahn, Youngjun Lee, Seungjun Lee, Hyunkyu Lee, Donghoi Kim, Yongsun Kim, Ji-Yong Park, Young-Kyun Kwon, Jaewu Choi, Chinkyo Kim
Summary: Controllable growth and facile transferability of crystalline films with desired characteristics are in high demand for advanced flexible devices. Thru-hole epitaxy provides a straightforward and undemanding method to achieve the desired crystallographic orientations and easy transferability of crystalline films, without limitations on the layer number, polarity, and surface characteristics of the 2D space layer. Connectedness of the grown material to the substrate through small net cross-sectional area of thru-holes enables crystallographic alignment and easy detachment of the grown material. Thru-hole epitaxy shows great potential for large-scale realization of advanced flexible devices with desired crystallographic orientation and facile transferability.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Inhee Maeng, Shi Chen, Seungjun Lee, Shenghao Wang, Young-Kyun Kwon, Min-Cherl Jung
Summary: The all-inorganic perovskite material gamma-CsPbI3 shows potential as a THz detector due to its high real conductivity and broad THz absorption spectra. It has controllable phonon vibration modes and lacks structural defects, making it a good candidate for commercialization.
MATERIALS TODAY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Sangmin Lee, Miyoung Kim, Young-Kyun Kwon
Summary: A hidden Rashba effect has been discovered in two-dimensional materials, showing a spin-layer locking phenomenon that allows for the manipulation of Rashba spin polarization in centrosymmetric materials. This effect is characterized by a unique helical spin texture with complete spin separation in space. The unconventional hidden Rashba effect observed in two-dimensional InTe, which involves two pairs of spin-degenerate bands, broadens our understanding of spin polarization phenomena and has potential applications in spintronics.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Seungjun Lee, D. J. P. de Sousa, Young-Kyun Kwon, Fernando de Juan, Zhendong Chi, Felix Casanova, Tony Low
Summary: In this study, we investigate the twist-angle dependence of spin-orbit coupling proximity effects and charge-to-spin conversion in graphene/WSe2 heterostructures from first principles. We find that the charge-to-spin conversion strongly depends on the twist angle, with optimal standard Rashba-Edelstein and disorder-free spin Hall efficiencies achieved at approximately 30 degrees twisting. The symmetry breaking due to twisting also gives rise to an unconventional Rashba-Edelstein effect, where the electrically generated nonequilibrium spin densities possess spins collinear to the applied electric field. Our work provides a new perspective on the electrical generation of spins in van der Waals heterostructures.
Article
Materials Science, Multidisciplinary
Sangmoon Yoon, Sangmin Lee, Subeen Pang, Miyoung Kim, Young-Kyun Kwon
Summary: This study highlights the importance of anisotropic Coulomb interactions in DFT+ U calculations of Mn3O4, particularly the significant effects in Mn3+ which impact the physical properties of the material.
Article
Chemistry, Multidisciplinary
Jeong Hwa Han, Hun Jeong, Hanjin Park, Hoedon Kwon, Dasol Kim, Donghyeok Lim, Seung Jae Baik, Young-Kyun Kwon, Mann-Ho Cho
Summary: This study investigated the impact of phase-change characteristics on the device performance of carbon-incorporated Ge2Sb2Te5 (CGST) to understand the enhanced reliability and stabilization of the device. The incorporation of up to 10% carbon was found to significantly increase structural stability, with strong bonds between C, Ge, and Sb reducing stochastic effects and improving device stability.
Article
Materials Science, Multidisciplinary
Javad G. Azadani, Seungjun Lee, Hyeong-Ryul Kim, Hussain Alsalman, Young-Kyun Kwon, Jerry Tersoff, Tony Low
Summary: The linear response model proposed in this study successfully predicted the DFT band alignment of Group-IV monochalcogenide vertical heterostructures, showing that the model falls between the Anderson and midgap models. The research results indicate that an alpha value of 0.34 best captures the DFT band alignment of the vdW heterostructure.
