Nano Letters
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11.24
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16482
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#1Yun Qiao (UMD: University of Maryland, College Park)H-Index: 22
#2Chaoji Chen (UMD: University of Maryland, College Park)H-Index: 47
Last. Liangbing Hu (UMD: University of Maryland, College Park)H-Index: 105
view all 10 authors...
The conventional thermal treatment systems typically feature low ramping/cooling rates, which lead to steep thermal gradients that generate inefficient, nonuniform reaction conditions and result in nanoparticle aggregation. Herein, we demonstrate a continuous fly-through material synthesis approach using a novel high-temperature reactor design based on the emerging thermal-shock technology. By facing two sheets of carbon paper with a small distance apart (1-3 mm), uniform and ultrahigh temperatu...
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#1Hao Wang (SUTD: Singapore University of Technology and Design)H-Index: 15
#2Qifeng Ruan (SUTD: Singapore University of Technology and Design)H-Index: 18
Last. Joel K. W. Yang (SUTD: Singapore University of Technology and Design)H-Index: 44
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Sculpting nanostructures into different geometries in either one or two dimensions produces a wide range of colorful elements in microscopic prints. However, achieving different shades of gray and control of color saturation remain challenging. Here, we report a complete approach to color and grayscale generation based on the tuning of a single nanostructure geometry. Through two-photon polymerization lithography, we systematically investigated color generation from the basic single nanopillar g...
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#1Fei Zhou (HIT: Harbin Institute of Technology)H-Index: 4
#2Yang Li (HIT: Harbin Institute of Technology)H-Index: 18
Last. Jie Yao (University of California, Berkeley)H-Index: 18
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Here, we report a novel topotactic method to grow 2D free-standing perovskite using KNbO3 (KN) as a model system. Perovskite KN with monoclinic phase, distorted by as large as ∼6 degrees compared with orthorhombic KN, is obtained from 2D KNbO2 after oxygen-assisted annealing at relatively low temperature (530 °C). Piezoresponse force microscopy (PFM) measurements confirm that the 2D KN sheets show strong spontaneous polarization (Ps) along [101]pc direction and a weak in-plane polarization, whic...
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#1Zhirong Zhang (USTC: University of Science and Technology of China)H-Index: 2
#2Chen Feng (USTC: University of Science and Technology of China)H-Index: 4
Last. Jie Zeng (USTC: University of Science and Technology of China)H-Index: 59
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Oxygen evolution reaction (OER) plays an important role in renewable energy supplies as the anodic reaction for electrochemical transformation of various chemicals. Iron-based OER catalysts are potential candidates due to their abundance but suffer from poor activity. Here we demonstrate that a single-atom iron catalyst with in-situ generated Fe4+ centers is highly active toward OER. Only an overpotential of 320 mV was needed to reach 10 mA cm-2. The catalyst exhibited an ultrahigh turnover freq...
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#1Zaoqi Duan (SEU: Southeast University)H-Index: 2
#2Zhiyong Wei (SEU: Southeast University)H-Index: 12
Last. Yunfei Chen (SEU: Southeast University)H-Index: 36
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Friction represents a major energy dissipation mode, yet the atomistic mechanism of how friction converts mechanical motion into heat remains elusive. It has been suggested that excess phonons are mainly excited at the washboard frequency, the fundamental frequency at which relative motion excites the interface atoms, and the subsequent thermalization of these nonequilibrium phonons completes the energy dissipation process. Through combined atomic force microscopy measurements and atomistic mode...
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#1Qing Li (TJU: Tianjin University)H-Index: 3
#2Jiaxing Zhang (TJU: Tianjin University)H-Index: 5
Last. Zhimin He (TJU: Tianjin University)H-Index: 38
view all 8 authors...
Self-assembled peptide materials with sequence-encoded properties have attracted great interest. Despite their intrinsic chirality, the generation of circularly polarized luminescence (CPL) based on the self-assembly of simple peptides has been rarely reported. Here, we report the self-assembly of peptides into hierarchical helical arrays (HHAs) with controlled supramolecular handedness. The HHAs can emit full-color CPL signals after the incorporation of various achiral fluorescent molecules, an...
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#1Zhenghua Li (State Ethnic Affairs Commission)
#2Bin Dong (State Ethnic Affairs Commission)H-Index: 18
Last. Chenglin Yan (Soochow University (Suzhou))H-Index: 53
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Efficient propagation of spin waves in a magnetically coupled vortex is crucial to the development of future magnonic devices. Thus far, only a double vortex can serve as spin-wave emitter or oscillator; the propagation of spin waves in the higher-order vortex is still lacking. Here, we experimentally realize a higher-order vortex (2D vortex network) by a designed nanostructure, containing four cross-type chiral substructures. We employ this vortex network as a waveguide to propagate short-wavel...
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#1Idris A Ajia (University of Southampton)
#2Jun-Yu Ou (University of Southampton)H-Index: 20
Last. Otto L. Muskens (University of Southampton)H-Index: 37
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Optically and vibrationally resonant nanophotonic devices are of particular importance for their ability to enhance optomechanical interactions, with applications in nanometrology, sensing, nano-optical control of light, and optomechanics. Here, the optically resonant excitation and detection of gigahertz vibrational modes are demonstrated in a nanoscale metasurface array fabricated on a suspended SiC membrane. With the design of the main optical and vibrational modes to be those of the individu...
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#1Qin Liu (CPU: China Pharmaceutical University)
#2Yang Zhong (CPU: China Pharmaceutical University)H-Index: 1
Last. Juanjuan Peng (CPU: China Pharmaceutical University)H-Index: 13
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The sensing and visualized monitoring of hydrogen sulfide (H2S) in vivo is crucial to understand its physiological and pathological roles in human health and diseases. Common methods for H2S detection require the destruction of the biosamples and are not suitable to be applied in vivo. In this Communication, we report a "turn-on" second near-infrared (NIR-II) luminescent approach for sensitive, real-time, and in situ H2S detection, which is based on the absorption competition between the H2S-res...
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#1Wang Jian (HUST: Huazhong University of Science and Technology)H-Index: 1
#1Jian Wang (HUST: Huazhong University of Science and Technology)H-Index: 30
Last. Lin Wang (HUST: Huazhong University of Science and Technology)H-Index: 40
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Stroke is one of most common causes of death and disability. Most of neuroprotective agents fail to rescue neurons from cerebral ischemic insults, mainly because of targeting downstream cascading events, such as excitotoxicity, oxidative and nitrosative stress, and inflammation, rather than improving hypoxia that initially occurs. Here, we report a near-infrared light (NIR)-driven nanophotosynthesis biosystem capable of generating oxygen and absorbing carbon dioxide, thus rescuing neurons from i...
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