Article
Chemistry, Physical
Wei Zhang, Tianxing Zheng, Bin Ai, Panpan Gu, Yuduo Guan, Yu Wang, Zhiyuan Zhao, Gang Zhang
Summary: Au-P-Au-coupled gold nanoparticle platforms with multiple nanogaps were fabricated using nanoskiving and polymer-assisted assembly. The platform showed strong electric field enhancement due to the confinement of incident light, leading to significant surface-enhanced Raman scattering performance and sensitive detection of glucose.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Luca Bonatti, Luca Nicoli, Tommaso Giovannini, Chiara Cappelli
Summary: This paper proposes a rational design route for engineered graphene-based nanostructures that have greatly enhanced electric fields in their proximity. The geometrical arrangements are inspired by nanopatterns that enable single molecule detection on noble metal substrates, while also considering experimental feasibility and ease in fabrication processes. The focus is on enhancing effects near edge defects and grain boundaries commonly found in graphene samples. By creating localized hot-spots with enhancement factors comparable to noble metal substrates, this paves the way for single molecule detection from graphene-based substrates.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Zulhumar Turup, Xiaoyu Yang, Pengwei Li, Hongfang Wang, Jingyu Wang, Min Gao
Summary: The properties of plasmonic hot spots in particle-on-film structures were investigated under oblique incidence. It was found that the hot spots were circularly distributed around the junction at specific wavelengths, and their locations could be manipulated by adjusting the incidence angle.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Olga Guselnikova, Roman Elashnikov, Vaclav Svorcik, Martin Kartau, Cameron Gilroy, Nikolaj Gadegaard, Malcolm Kadodwala, Affar S. S. Karimullah, Oleksiy Lyutakov
Summary: The use of surface enhanced Raman scattering (SERS) combined with disposable chiral plasmonic shurikens and silver nanoclusters allows for effective detection and discrimination of chiral compounds with high sensitivity. Numerical simulations were used to study the effects of shuriken geometry, silver nanostructured layer parameters, and SERS excitation wavelength(s) on the observed SERS response. The designed structures were able to successfully discriminate cysteine enantiomers and probe biomolecular chirality using a standard Raman spectrometer.
NANOSCALE HORIZONS
(2023)
Article
Multidisciplinary Sciences
Sara Seweryn, Katarzyna Skirlinska-Nosek, Natalia Wilkosz, Kamila Sofinska, David Perez-Guaita, Magdalena Ocwieja, Jakub Barbasz, Marek Szymonski, Ewelina Lipiec
Summary: This study investigated the repair process of DNA double-strand breaks (DSBs) induced by the anticancer antibiotic bleomycin (BLM) using a multimodal approach. By analyzing the SERS results, spectral bands associated with DSBs were identified, indicating conformational modifications and strand ruptures. A model was established to predict the number of DSBs and detect spectroscopic markers of DNA damage and conformational changes.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Mengxiang Song, Deming Huang, Nan Huo, Essy Kouadio Fodjo, Wei Deng, Dan Li
Summary: This study developed a stimulus-responsive three-dimensional microgel decorated with nanoparticles, which allows precise control of hot spots region by regulating temperature and moisture. It can simultaneously regulate structures and capture target molecules, as well as self-clean, achieving recyclable and reliable SERS analysis of solid samples.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Younghyun Wy, Hayoon Jung, Jong Wook Hong, Sang Woo Han
Summary: This article reviews recent developments in the synthesis of gold nanostructures with multiple hot spots and Au-based heterostructures for plasmon-induced sensing and photocatalysis. Gold nanostructures with multiple hot spots exhibit enhanced molecular sensing and surface-enhanced Raman scattering performance, while Au-based heterostructures have shown great promise in photocatalytic reactions. The rational design of these nanostructures can lead to enhanced sensing and photocatalysis.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Xiaoyi Jiang, Jindou Huang, Zhenhua Bi, Wenjun Ni, Gagik Gurzadyan, Yongan Zhu, Zhenyi Zhang
Summary: This research proposes a plasmonic active hot spot-confined photocatalysis technology to achieve efficient and selective CO2 reduction by forming active hot spots in the Au/TiO2/W18O49 heterostructure, resulting in the production of abundant CH4 and CO.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Analytical
Neetika Singh, Anand M. Shrivastav, Nipun Vashistha, Ibrahim Abdulhalim
Summary: In this study, a microporous deep silicon substrate coated with an optimum Au layer is used to achieve ultrahigh SERS enhancement for explosives trace detection. By scattering and coupling of short lived extended plasmons with localized ones, a microporous structure with quasi-periodicity provides an ultrahigh local optical field and achieves the ultrahigh SERS enhancement. The SERS activity and reproducibility of the substrate are tested using 4-ATP monolayer immobilized over the substrate, and different methods including peak absolute intensity and peak ratios are analyzed. The obtained enhancement factor for Raman signal is of the order of 10^6-10^7, which is explained by the existence of a 3D hot-spot network and the coupling between localized and extended plasmons. The coupling is confirmed by the Rabi splitting observed in the reflectivity dip. A 2-3 times reduction in signal variability is achieved using peak ratio analysis. The substrate is further applied for picric acid sensing, with detection limits of 7.48 nM and 2.87 nM based on peak height and ratio measurements, respectively. The results suggest that deep microporous silicon coated with a 200 nm Au layer over a large area is a promising candidate for SERS and sensing of ultra-trace amounts of chemicals.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Soohyun Lee, Jaewon Lee, Sungwoo Lee, MohammadNavid Haddadnezhad, Myeong Jin Oh, Qiang Zhao, Sungjae Yoo, Lichun Liu, Insub Jung, Sungho Park
Summary: The rational design of PtAu double nanoframes (DNFs) with plasmon-enhanced electrocatalytic activity for the methanol oxidation reaction (MOR) is reported. The synthetic strategy for the DNFs involves multiple synthetic chemical steps including Au growth, Pt deposition, and Au etching. The DNFs exhibit tunable intra-nanogap distance, with residual Au adatoms acting as light entrappers and producing plasmonic hot spots between inner and outer frames through localized surface plasmon resonance (LSPR) coupling, resulting in enhanced electrocatalytic activity for the MOR. Hierarchically structured triple NFs (TNFs) are also synthesized, showing superior electrocatalytic activity under light irradiation compared to dark conditions.
Article
Chemistry, Multidisciplinary
Zhi-Jun Zhao, Junseong Ahn, Soon Hyoung Hwang, Jiwoo Ko, Yongrok Jeong, Moonjeong Bok, Hyeok-Joong Kang, Jungrak Choi, Sohee Jeon, Inkyu Park, Jun-Ho Jeong
Summary: A simple method proposed in this study allows for the fabrication of large-area, ultra-small nanogaps on a flexible substrate, with the ability to easily control the gap size and produce 3D multilayer nanostructures and nanocomposites without the need for post-treatment. This method offers a fast, simple, and cost-effective approach to nanofabrication with potential applications in flexible electronics and soft actuators.
Article
Chemistry, Multidisciplinary
Xi Yang, Dong Su, Xie Yu, Pei Zeng, Huageng Liang, Guangzu Zhang, Boxiang Song, Shenglin Jiang
Summary: The controllable nanogap structures enable strong and adjustable localized surface plasmon resonance (LSPR). A novel hierarchical plasmonic nanostructure (HPN) is created using colloidal lithography with a rotating coordinate system. The HPN increases the density of hot spots and enhances LSPR tunability and field enhancement. The hot spot engineering strategy of HPNs is demonstrated in surface-enhanced Raman spectroscopy (SERS) applications and allows single-molecule level detection and long-range mapping, providing a platform and guidance for various LSPR applications.
Article
Materials Science, Multidisciplinary
Karina A. Guerrero-Becerra, Andrea Tomadin, Andrea Toma, Remo Proietti Zaccaria, Francesco De Angelis, Marco Polini
Summary: A method is proposed to directly probe the magnetic field at the hot spot by placing a graphene ribbon in the hot spot of a plasmonic nanostructure. A nonlinear Hall voltage generated across the ribbon allows for the measurement of the magnetic field using standard electrical means.
Article
Chemistry, Multidisciplinary
Longkun Yang, Zhifang Ren, Meng Zhang, Yanli Song, Pan Li, Yun Qiu, Pingye Deng, Zhipeng Li
Summary: The three-dimensional porous SERS powder material, engineered with Ag nanoparticles on silica aerogel, shows great potential for highly sensitive analyte enrichment and near field enhancement. The material exhibits stable calibration curves, making it suitable for quantitative analysis, and can be utilized for on-site SERS applications in chemical analysis, environmental monitoring, and anti-terrorism.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Li Wang, Jian Huang, Mei-Juan Su, Jin-Di Wu, Weisheng Liu
Summary: A AgNPs decorated 3D bionic silicon nanograss SERS substrate with higher sensitivity and specificity was prepared by green galvanic displacement. The substrate not only has a larger specific surface area, but also provides abundant hot spots for high-sensitivity SERS sensing.
Article
Multidisciplinary Sciences
Si Woo Lee, Jong Min Kim, Woonghyeon Park, Hyosun Lee, Gyu Rac Lee, Yousung Jung, Yeon Sik Jung, Jeong Young Park
Summary: The interaction between metal and oxides is a crucial factor influencing the selectivity of a desirable reaction. Designing a well-formed metal-oxide interface in a heterogeneous catalyst is important for understanding selectivity and surface electronic excitation at the interface. The study demonstrates the real-time detection of hot electron flow and impact of metal-oxide interface on catalytic selectivity in a nanoscale catalytic Schottky diode.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Bo-In Park, Miri Shin, Jaeho Park, Jae-Seung Lee, Seung Yong Lee, Seunggun Yu
Summary: In this study, high crystallinity Bi0.5Sb1.5Te3.0 (BST) nanoparticles (NPs) were successfully synthesized via a mechanochemical process, and their sizes were further reduced and uniformly distributed through a wet-milling process. The BST nanocomposites fabricated from BST NPs with smaller grain sizes and finer distributions exhibited significantly reduced thermal conductivities. Wet-milled BST NPs showed ultralow thermal conductivity values at approximately 398 K, demonstrating their potential for thermoelectric applications.
Review
Chemistry, Multidisciplinary
Yang Liu, Minjoon Kim, Seunghee H. Cho, Yeon Sik Jung
Summary: SERS is a powerful analytical technique allowing ultrasensitive detection of various analytes, and the key challenge lies in designing and fabricating substrates with high sensitivity, stability, and signal reproducibility. Recent advancements in nanofabrication and plasmonic properties of nanomaterials have led to significant progress in complex nanostructures for ultrasensitive and reliable measurements.
Article
Chemistry, Multidisciplinary
Woon Ik Park, Tae Wan Park, Young Joong Choi, Sangryun Lee, Seunghwa Ryu, Xiaogan Liang, Yeon Sik Jung
Summary: EPIL is an extreme-pressure imprint lithography technique that can produce well-defined multiscale structures on diverse surfaces from 10 nm to 10 mm without the use of precursors, heating, UV exposure, or pattern transfer. Its versatility has been demonstrated through successful applications to various materials such as Ni, Cu, steel, and organics, showing potential for large-area nanofabrication of devices in the future when combined with other nanopatterning technologies.
Article
Multidisciplinary Sciences
Jong Min Kim, Ahrae Jo, Kyung Ah Lee, Hyeuk Jin Han, Ye Ji Kim, Ho Young Kim, Gyu Rac Lee, Minjoon Kim, Yemin Park, Yun Sik Kang, Juhae Jung, Keun Hwa Chae, Eoyoon Lee, Hyung Chul Ham, Hyunchul Ju, Yeon Sik Jung, Jin Young Kim
Summary: A three-dimensionally customized, multiscale Pt nanoarchitecture demonstrated superior performance and durability compared to commercial Pt/C materials in fuel cells. The study suggests that controlling the structure through precision engineering of reaction surfaces and mass transfer can lead to the design and fabrication of high-performance electrocatalysts.
Article
Multidisciplinary Sciences
Kyeong Min Song, Shinho Kim, Sungmin Kang, Tae Won Nam, Geon Yeong Kim, Hunhee Lim, Eugene N. Cho, Kwang Ho Kim, Se Hun Kwon, Min Seok Jang, Yeon Sik Jung
Summary: The highly responsive and selective transparency-switching medium demonstrated in this study can present three transparency states based on liquid-polymer interactions and diffusion kinetics, making it ideal for on-site, visual identification of various liquids.
Article
Chemistry, Physical
Byung Chul Yeo, Hyunji Nam, Hyobin Nam, Min-Cheol Kim, Hong Woo Lee, Sung-Chul Kim, Sung Ok Won, Donghun Kim, Kwan-Young Lee, Seung Yong Lee, Sang Soo Han
Summary: The study introduces a high-throughput screening protocol for discovering alternative catalysts to palladium, identifying a previously unreported bimetallic catalyst with enhanced performance and productivity.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hyeuk Jin Han, Gyu Rac Lee, Yujin Han, Hanhwi Jang, Eugene N. Cho, Sunho Kim, Chang Sub Kim, Soonmin Yim, Jae Won Jeong, Jong Min Kim, Seunghee Yu, Harry L. Tuller, Yeon Sik Jung
Summary: Controlled fabrication of three-dimensional metal oxide nanowire networks can greatly enhance signal stability and sensor response compared to random nanowire arrays. Systematic engineering and modeling of 3D geometries provide insights into the electrical conduction and gas-sensing response of 3D assemblies, revealing the critical importance of wire-to-wire junction points and their arrangement, to improve both performance and reliability of chemical sensors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Moohyun Kim, Byoung-Hwa Kwon, Chul Woong Joo, Myeong Seon Cho, Hanhwi Jang, Ye ji Kim, Hyunjin Cho, Duk Young Jeon, Eugene N. Cho, Yeon Sik Jung
Summary: Metal oxide charge transfer complex enables effective energy level modulation and enhanced conductivity, leading to high performance in optoelectronic devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jeongsu Pyeon, Kyeong Min Song, Yeon Sik Jung, Hyoungsoo Kim
Summary: In this work, polygonal coffee-ring-less QD microarrays are created using two sequential solutal Marangoni flows, effectively solving the issue of poor uniformity in QD-LEDs.
Article
Multidisciplinary Sciences
Hyeuk Jin Han, Gyu Rac Lee, Yujun Xie, Hanhwi Jang, David J. Hynek, Eugene N. Cho, Ye Ji Kim, Yeon Sik Jung, Judy J. Cha
Summary: Effective grain growth suppression in metal oxide nanoribbons can be achieved by tuning the metal-to-oxygen ratio and confining the nanoribbons during high-temperature annealing, maintaining small grain size and structural integrity. Excess oxygen in amorphous tin oxide nanoribbons prevents merging of small grains during crystallization, leading to suppressed grain growth. Gas sensors using grain growth-suppressed tin oxide nanoribbons show high sensitivity and unusual long-term operation stability.
Article
Nanoscience & Nanotechnology
Byung Jun Park, Yeoheung Yoon, Young Hee Han, Yeon Sik Jung
Summary: By utilizing intermolecular force attraction strategy in a co-solvent system, self-aggregated mesoporous MXene materials without additives were successfully achieved, resulting in a significantly higher specific surface area. The resulting MXene-based electrodes exhibited higher specific capacitance and improved cyclic retention. This method is simple, scalable, and suitable for mass production of MXene materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Jaeho Yoon, Hanhwi Jang, Min-Wook Oh, Thomas Hilberath, Frank Hollmann, Yeon Sik Jung, Chan Beum Park
Summary: The authors demonstrate the direct conversion of low-grade waste heat into chemical energy using a combination of thermoelectric materials and biocatalysts. The results show that thermoelectric materials, such as bismuth telluride, can efficiently convert low-temperature waste heat into chemical energy and promote oxyfunctionalization reactions. This study highlights the feasibility of thermoelectrobiocatalysis in utilizing low-quality waste heat for practical applications.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Kyeong Min Song, Moohyun Kim, Hyunjin Cho, Hongjoo Shin, Geon Yeong Kim, Soonmin Yim, Tae Won Nam, Yeon Sik Jung
Summary: This article introduces a noninvasive surface-wetting approach to pattern multicolor quantum-dot (QD) arrays on a photoprogrammed hole transport layer (HTL). By modifying the surface of HTLs and controlling solvent evaporation kinetics, the area-selective wetting of QD patterns is achieved, while preventing cross-contamination between different QD colloids. Prototype electroluminescent quantum dot light-emitting diode arrays with high current efficiency and brightness were successfully realized.
Article
Chemistry, Multidisciplinary
Yoo Min Shin, Ji Hyeon Lee, Geon Yeong Kim, Hae Mee Ju, Yeon Sik Jung, Jea Woong Jo, Min-Jae Choi
Summary: In this study, all-inorganic perovskite nanowires with minimized surface defects were synthesized using a dual-phase passivation strategy. These nanowires were used as an interfacial layer in perovskite solar cells, resulting in an increased power conversion efficiency.
ADVANCED FUNCTIONAL MATERIALS
(2023)
