Results 71 to 80 of about 72,047 (222)

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source

The Hide-and-Seek of Grain Boundaries from Moire Pattern Fringe of Two-Dimensional Graphene [PDF]

, 2015
Grain boundaries (GBs) commonly exist in crystalline materials and affect various properties of materials. The facile identification of GBs is one of the significant requirements for systematical study of polycrystalline materials including recently ...
BI Yakobson, C Blakemore, CC Lu, CH Lui, CJD Hetherington, CJD Hetherington, DS Lee, E Cockayne, GH Li, GH Ryu, H Terrones, J Hicks, JB Jasinski, JD Wood, JF Zhang, JF Zhang, JH An, JH Warner, JM Yuk, JMBL Dos Santos, K Kim, L Brown, LJ Yin, LO Nyakiti, LO Nyakiti, Lord Rayleigh, LP Biro, M Abolhassani, M Neek-Amal, MK Singh, OV Yazyev, PY Huang, QK Yu, R Grantab, R Heilbronner, R Snowden, S Malola, S Shallcross, T Ohta, TH Liu, W Bollmann   +40 more
core   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Gate-defined Kondo lattices with valley-helical quantum dot arrays

SciPost Physics
Kondo physics and heavy-fermion behavior has been predicted and observed in moiré materials. The electric tunability of moiré materials allows an in-situ study of Kondo lattices' phase diagrams, which is not possible with their intermetallic counterparts.
Antonio L. R. Manesco
doaj   +1 more source

Tuning the Electronic Properties of Rotated Graphene on Ni(111) by Nickel Carbide Intercalation [PDF]

, 2016
High-temperature-deposited rotated graphene (Gr) on Ni(111) has been investigated by in situ scanning tunneling microscopy and spectroscopy at room temperature.
Bernien, Matthias, Kuch, Wolfgang, Song, Jiaming, Wu, Chii-Bin   +3 more
core   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Moiré-engineered light-matter interactions in MoS2/WSe2 heterobilayers at room temperature

Nature Communications
Moiré superlattices in van der Waals heterostructures represent a highly tunable quantum system, attracting substantial interest in both many-body physics and device applications. However, the influence of the moiré potential on light-matter interactions
Qiaoling Lin, Hanlin Fang, Alexei Kalaboukhov, Yuanda Liu, Yi Zhang, Moritz Fischer, Juntao Li, Joakim Hagel, Samuel Brem, Ermin Malic, Nicolas Stenger, Zhipei Sun, Martijn Wubs, Sanshui Xiao   +13 more
doaj   +1 more source

Band Structure Engineering of 2D Materials using Patterned Dielectric Superlattices

, 2017
The ability to manipulate two-dimensional (2D) electrons with external electric fields provides a route to synthetic band engineering. By imposing artificially designed and spatially periodic superlattice (SL) potentials, 2D electronic properties can be ...
Dean, Cory R., Forsythe, Carlos, Kim, Philip, Koshino, Mikito, Moon, Pilkyung, Pasupathy, Abhay, Taniguchi, Takashi, Watanabe, Kenji, Zhou, Xiaodong   +8 more
core   +1 more source

Photonic crystals for nano-light in moir\'e graphene superlattices [PDF]

, 2018
Graphene is an atomically thin plasmonic medium that supports highly confined plasmon polaritons, or nano-light, with very low loss. Electronic properties of graphene can be drastically altered when it is laid upon another graphene layer, resulting in a ...
Basov, D. N., Fogler, M. M., Jiang, B. -Y., Kim, P., McLeod, A. S., Ni, G. X., Stauber, T., Sternbach, A., Sunku, S. S., Taniguchi, T., Watanabe, K., Xiong, L., Yoo, H.   +12 more
core   +3 more sources