Article
Chemistry, Physical
Kuai Yu, Yiqi Jiang, Cameron Wright, Gregory Hartland
Summary: This article provides an overview of the damping of vibrational modes in nanostructures excited by ultrafast laser. It discusses the influence of liquid viscosity and viscoelasticity on energy dissipation, and presents the continuum mechanics theory and experimental measurements of damping. The article focuses on the breathing modes of spheres, cylinders, and plates, and analyzes the differences between different shapes and the dependence of relaxation times on nanostructure dimensions. It also highlights the unique information about nanoscale material properties that can be obtained from the quality factors of the breathing modes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Zhijia Wang, Yuqi Hou, Zepeng Huo, Qiang Liu, Weiqing Xu, Jianzhang Zhao
Summary: Two-photon absorption (TPA) is commonly used in confocal microscopy and 3D polymerization, but requires expensive and high-power femtosecond lasers. A new technique based on triplet-triplet-annihilation upconversion using continuous wave lasers has been developed as a promising alternative, demonstrating spatially confined excitation for photopolymerization.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Chunyang Xu, Kaicheng Luo, Yiqian Du, Huibin Zhang, Xiaowei Lv, Hualiang Lv, Ruixuan Zhang, Chang Zhang, Jincang Zhang, Renchao Che
Summary: Researchers successfully fabricate abundant nanometer-sized magnetic heterostructures with controlled magnetic components and specific interfaces through the utilization of surface energy anisotropy differences. The heterostructures demonstrate multilevel interfacial polarization effects and exhibit improved electromagnetic wave absorption performance. The study introduces a novel avenue for investigating the intricate relationship between structure and properties in magnetic heterostructures. Rating: 8/10.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Theresa Lauster, Dorothee Stoeckle, Katharina Gabor, Theresa Haller, Natalie Krieger, Pia Lotz, Ravikumar Mayakrishnan, Ellen Spaeth, Steffi Zimmermann, Pantelis Livanos, Sabine Mueller
Summary: In this study, the role of PLECKSTRIN HOMOLOGY GTPase ACTIVATING PROTEINS (PHGAPS) in pavement cell shape establishment was investigated. It was found that PHGAPS interacted with ROP2 and showed distinct enrichment in the indentation regions of pavement cells. This localization was established upon undulation initiation and was maintained throughout cell expansion. These findings highlight the importance of PHGAPS in the establishment of ROP activity gradients and the coordinated establishment of multipolarity in epidermal cells.
Article
Chemistry, Physical
Qing Shi, Hantao Liu, Junfei Liang, Yaohui Zhang, Yaqian Dong, Weiyou Yang, Qiao Liu
Summary: In this work, a one-pot strategy was developed to fabricate NiFe layered double hydroxide nanosheets interconnected by carbon nanofibers, which exhibited enhanced oxygen evolution reaction (OER) catalytic activity and stability. The catalyst showed great potential for cost-efficient water splitting devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Aisha Ahsan, Luiza Buimaga-Iarinca, Thomas Nijs, Sylwia Nowakowska, Sk Rejaul, S. Fatemeh Mousavi, Mehdi Heydari, Meike Stoehr, Sameena S. Zaman, Cristian Morari, Lutz H. Gade, Thomas A. Jung
Summary: Host-guest architectures provide ideal systems for investigating site-specific physical and chemical effects. In this study, we found that the symmetry, registry, lateral packing, and adsorption height of small clusters formed upon condensation are modified by the presence of cycloalkanes in confined spaces. While cyclopentane and cycloheptane show cooperativity upon filling, cyclooctane and to a lesser degree cyclohexane redistribute to more favorable adsorption sites. This site-specific modification of interaction and behavior is crucial for applications of porous materials in gas storage or catalysis.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Qinyi Li, Dongyang Shen, Chengzhao Luo, Zhishuai Zheng, Wenlin Xia, Wenchen Ma, Jie Li, Yixing Yang, Song Chen, Yu Chen
Summary: In this study, spatially confined CsPbBr3 nanocrystals were in-situ crystallized within uniform mesoporous SiO2 nanospheres to enhance their stability and thermotolerance. The prepared CsPbBr3 nanocrystals showed excellent stability in harsh conditions and maintained consistent room temperature photoluminescence intensity after continuous heating-cooling cycles. The fabricated LCD backlit based on these nanocrystals exhibited a wide color gamut, indicating their potential in practical display field.
Article
Chemistry, Multidisciplinary
Yunpeng Zuo, Tingting Li, Ning Zhang, Tianyun Jing, Dewei Rao, Patrik Schmuki, Stepan Kment, Radek Zboril, Yang Chai
Summary: The process of reducing catalyst size to single-atom level can significantly enhance its catalytic activity. By utilizing a spatially confined synthetic strategy with a specific compound and porous hollow carbon nitride (p-CN), it is possible to mass synthesize metal single-atom catalysts to further improve catalytic activity.
Article
Engineering, Environmental
Jianfeng Zheng, Shuo Zhang
Summary: This study explores the use of partially hydrated superoxide radicals (O2•-) for the degradation and mineralization treatment of persistent perfluorinated compounds. By confining the hydration shell of O2•-, the researchers were able to enhance its reactivity and achieve efficient degradation. The compact reactor design showed high degradation efficiency and cost-effectiveness under an ultrafiltration reaction mode.
Article
Chemistry, Multidisciplinary
Yuwei Deng, Xiangyun Xi, Yan Xia, Yangfei Cao, Shuqing Xue, Siyu Wan, Angang Dong, Dong Yang
Summary: Two-dimensional superlattices composed of FeP nanoframes are synthesized through a space-confined topochemical transformation approach. The resulting superlattices possess unique structural features and superior catalytic performance, making them suitable for catalytic applications.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zihan Liu, Zihao Chen, Shuangye Yang, Hong Jia, Jie Wei
Summary: In this study, a photoresponsive CdS/PDMS photonic crystal composite was developed by combining CdS photonic crystals with PDMS. By controlling the size of the CdS colloidal microsphere and adding photochromic substances, photonic crystals with two different structural colors and photoresponsive characteristics were achieved. This research expands the application of information anticounterfeiting, particularly in the design of UV anticounterfeiting labels.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Zihan Liu, Zihao Chen, Shuangye Yang, Hong Jia, Jie Wei
Summary: In this study, CdS photonic crystals were combined with PDMS to create a photoresponsive composite material. By controlling the size of the CdS colloidal microsphere and adding photochromic substances, two different structural colors were achieved. The effects of the photosensitive material on the optical properties and surface features of the photonic crystals were also studied.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hua Zhang, Fei Wan, Xiaogang Li, Xiaohui Chen, Shenglin Xiong, Baojuan Xi
Summary: This study reports a method of synthesizing ultrafine bimetal PtMo nanocrystals through an anchoring-sites engineering strategy, in which N-rich carbon can provide abundant anchoring sites and suppress over-aggregation. The PtMo-NC catalyst exhibits superior HER performance in both alkaline and acidic conditions, delivering smaller overpotentials (80 mV and 63 mV) at a current density of 100 mA cm(-2). The introduction of Mo atoms into Pt can reduce the energy barrier of water molecule dissociation and optimize the absorption strength of H intermediates on Pt sites, thereby boosting the catalytic HER performance. This study offers a universal strategy for designing ultrafine nanocatalysts for high-efficiency electrocatalysis.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Beibei Yang, Duan Bin, Qingmei Zhong, Binxiao Li, Yixin Liu, Hongbin Lu, Baohong Liu
Summary: The study presents a novel RuxCuyP2/CNF catalyst with excellent HER electroactivity in 1.0 M NaOH electrolyte, outperforming commercial 20% Pt/C catalyst. This simple, cost-effective, and environmentally friendly method paves the way for the design of bimetallic phosphide nanocluster catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Paper & Wood
Antonio M. Borrero-Lopez, Luiz G. Greca, Orlando J. Rojas, Blaise L. Tardy
Summary: This study evaluated the self-assembly of cellulose nanocrystal superstructures and optimized the long-range order within the microstructures by adjusting the confinement geometry. Thinner confinement and lower temperature were found to improve the formation of periodic microstructures. The drying process was monitored using rheological analysis, and the adhesive properties of the superstructures were evaluated.
Article
Chemistry, Multidisciplinary
Jeong Hun Choi, Nitee Kumari, Jung Hun Koo, Amit Kumar, Changhoon Lee, Ji Hoon Shim, Zhipeng Wang, Sang Ho Oh, In Su Lee
Summary: This study presents a facile method for the synthesis of unconventional amorphous hollow-silica nanostructures with controllable surface curvatures, symmetries, and interior architectures. The key role of transiently in situ crystallized metal coordination complexes as a template is identified for the differential silica growth that produces different nanostructures. Furthermore, crystal-like well-defined polygonal h-SiNSs can be assembled into highly ordered mesoscale materials with customizable cavities and nanospaces, which differ from conventionally assembled materials.
Article
Chemistry, Multidisciplinary
Yu-Rim Hong, Soumen Dutta, Sun Woo Jang, Odongo Francis Ngome Okello, Hyeonae Im, Si-Young Choi, Jeong Woo Han, In Su Lee
Summary: This study addresses the inefficient interfacial contact effect in Pt-catalyzed alkaline hydrogen evolution reaction (HER) by producing atomically flat two-dimensional Pt nanodendrites (2D-PtNDs) and realizing a maximized and firmly bound lateral heterointerface with NiFe-layered double hydroxide (LDH). This work demonstrates the importance of shape and facet of Pt in creating heterointerfaces that provide catalytic synergy for efficient hydrogen production.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Chemistry, Multidisciplinary
Amit Kumar, Soumen Dutta, Seonock Kim, Taewan Kwon, Santosh S. Patil, Nitee Kumari, Sampathkumar Jeevanandham, In Su Lee
Summary: Nanomaterials with unique structures and compositions can exhibit exotic physicochemical properties and have various applications. Solid-state reaction synthesis offers potential for scalable access to a wide range of crystal phases and intricate compositions. However, controlling nanoscale features through solid-state reactions requires a strategic nanospace-confinement approach to avoid heat-induced reshaping and sintering.
Article
Chemistry, Multidisciplinary
Jongwon Lim, Nitee Kumari, Trimbak B. Mete, Amit Kumar, In Su Lee
Summary: In this study, a nanoreactor platform was developed to synchronize reaction steps at unconnected sites, minimizing conflicting effects. The reaction process and product yields were controlled through convenient remote operations. The use of this platform enabled the successful implementation of a tandem reaction with excellent yield, opening possibilities for designing diverse catalytic schemes.
Article
Chemistry, Multidisciplinary
Anubhab Acharya, In Su Lee
Summary: Plasmonically coupled nanoreactors capable of harnessing light energy and efficiently transforming it to perform chemical reactions are in significant demand in the field of catalysis. The development of unique solution-phase synthesis techniques for engineering intricate nanoarchitectures by introducing multiple functionalities can dramatically improve the efficacy of these nanostructures. In this context, the precise modulation of the nanostructural features and the integration of other components with the plasmonic nanoparticles within an isolated nanoconfined reaction environment is the current state of the art for their synthesis.
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yu-Rim Hong, Sungho Choi, Soumen Dutta, Insu Jeong, Soojin Park, In Su Lee
Summary: By utilizing 1 nm-thin Ni3CoOx nanosheets, the efficient confinement effect of nanospace enables high-rate capability, outstanding cycle stability, and high Coulombic efficiency, which has not been achieved with other transition-metal oxides.
Article
Chemistry, Multidisciplinary
Byeong Su Gu, Soumen Dutta, Yu-Rim Hong, Odongo Francis Ngome Okello, Hyeonae Im, Seungil Ahn, Si-Young Choi, Jeong Woo Han, Sunmin Ryu, In Su Lee
Summary: By modifying the surfaces of 2D-Pt nanodendrites, Pd and Ni were successfully deposited on the {110} facet and {111/100} edge, respectively, forming heterointerfaces. These differently located heterointerfaces exhibited different electronic effects, leading to different electrocatalytic activities in the hydrogen evolution reaction. The edge-located n-Ni showed faster water dissociation and outperformed the facet-located e-Pd in terms of catalytic activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Soumen Dutta, Akshay Gurumoorthi, Shinbi Lee, Sun Woo Jang, Nitee Kumari, Yu-Rim Hong, Wonyong Choi, Chang Yun Son, In Su Lee
Summary: By utilizing few-nm-thin two-dimensional nanocrystals of MOF-5, a crystal lattice-guided wet-chemical etching process has been developed to regulate attractive pore patterns on the MOF surface. The optimized etching process produces size-tunable fractal-pores that enhance the activity and stability of the supported catalyst in photoelectrochemical CO2-to-CO reduction. The long-range fractal opening in the 2D MOF support structure facilitates cross-interface charge transportation and exposure of immobilized Re-I-catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jeong Hun Choi, Nitee Kumari, Amit Kumar, Anubhab Acharya, Jungsoo Ahn, Jaerim Kim, Hyeonwoong Hwang, Taiha Joo, Jong Kyu Kim, In Su Lee
Summary: Silicon nanostructures can be used for various biomedical applications, but it is challenging to maintain their subhundred nm size during the silica-to-silicon conversion at high temperatures. The SC-SSR method utilizes a metal-silicide stratum space inside silica nanospheres to guide the synthesis of hollow and porous SiNSs through a magnesiothermic reduction reaction. The mechanism involves the participation of metal-silicide species to achieve solid-to-hollow transformation within a predefined radial boundary. The resulting hydrophilic SiNSs can be used as photoluminescence-based bioimaging probes in different biomedia, and rattle-like SiNSs encapsulated with Pd nanocrystals can catalyze intracellular synthesis of probe molecules through C-C cross coupling reaction.
Review
Chemistry, Multidisciplinary
Soumen Dutta, Byeong Su Gu, In Su Lee
Summary: This paper reviews the synthesis and benefits of a new class of electrocatalytic materials, namely h-2D-PGM nanosheets, highlighting the importance of porous and two-dimensional structures in electrocatalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Sun Woo Jang, Nitee Kumari, Eonu Nam, Yun Kyung Lee, Yunmi Cha, Kwangjin An, In Su Lee
Summary: Controlling the assembly of nanoparticles into well-defined structures allows the development of advanced materials with tailored properties. However, the controlled assembly of highly anisotropic 2D nanosheets is challenging. This research discovers the controlled self-assembly of 2D-silica nanosheets into hollow soccer ball-like shells, which exhibit high mechanical stability and excellent performance as catalyst support.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Sampathkumar Jeevanandham, Ankur Maji, Anubhab Acharya, Nitee Kumari, Byeong Su Gu, Youngkwan Yoon, Hee Cheul Choi, Amit Kumar, In Su Lee
Summary: By sandwiching an ultrathin 2D-Cu layer inside a bilayer silica template, researchers discovered the important cooperative role of Lewis basic amino-silica microenvironment in the selective hydrogenation reaction catalyzed by copper. The newly developed nanospace-confined electrochemical atomic layer deposition technique allowed for the synthesis of an ultrathin Cu(0)-layer that transformed the originally non-reactive Cu film into an efficient catalyst. This study presents a new approach for controlling complex molecular interactions in heterogeneous catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu-Rim Hong, Sungho Choi, Soumen Dutta, Insu Jeong, Soojin Park, In Su Lee
Summary: Nanoscale optimization of late transition-metal oxides is crucial for advancing next-generation Li-ion battery technologies by fixing the reversible lithiation/delithiation mechanism and understanding nanocrystal conversion chemistry in depth.