Results 91 to 100 of about 454,935 (314)

Suppression of Photo‐Mediated Traps in Integrated Organic Photovoltaic–Photodetector Devices via N‐Type Self‐Assembly‐Driven Interfacial Engineering

Advanced Functional Materials, EarlyView.
Conventional unstable electron transport layers (ETLs) limit self‐powered organic sensors. This work resolves this by developing a n‐type self‐assembled monolayer (SAM), “3‐PAPh”. This SAM forms a chemically stable and structurally ordered interface that fundamentally suppresses defect formation.
Ohhyun Kwon, Jae Hoon Son, Tae Hyuk Kim, Gyeong Min Lee, Seunghyun Oh, Gayoung Ham, Min Jong Lee, Sang Heon Lee, Seon Joong Kim, Hyojung Cha, Han Young Woo, Jae Won Shim   +11 more
wiley   +1 more source

Robust nodal structure of Landau level wave functions revealed by Fourier transform scanning tunneling spectroscopy. [PDF]

Physical Review Letters, 2012
Scanning tunneling spectroscopy is used to study the real-space local density of states of a two-dimensional electron system in a magnetic field, in particular within higher Landau levels.
K. Hashimoto, T. Champel, S. Florens, C. Sohrmann, J. Wiebe, Y. Hirayama, R. Römer, R. Wiesendanger, M. Morgenstern   +8 more
semanticscholar   +1 more source

Near‐Infrared Light‐Programmable Negative Differential Transconductance in Organic Electrochemical Transistors for Reconfigurable Logic

Advanced Functional Materials, EarlyView.
Organic electrochemical transistors based on a Near‐Infrared (NIR)‐responsive polymer p(C4DPP‐T) and iodide electrolyte exhibit optically programmable negative differential transconductance. NIR illumination triggers an iodine‐mediated redox process, enabling a transition from binary to ternary conductance states within a single‐layer device.
Debdatta Panigrahi, Christina J. Kousseff, Aristea Pavlou, Zeinab Hamid, Iain McCulloch, Fabrizio Torricelli, Paul W. M. Blom, Paschalis Gkoupidenis   +7 more
wiley   +1 more source

Raman and scanning tunneling spectroscopic investigations on graphene-silver nanocomposites

Journal of Science: Advanced Materials and Devices, 2018
Graphene-silver (G-Ag) nanocomposites were prepared using liquid phase exfoliation of graphite flakes followed by a reduction of silver nitrate. The plasmonic characteristics of these nanocomposites are highly sensitive to the Ag concentration in the ...
Sheena S. Sukumaran, C.R. Rekha, A.N. Resmi, K.B. Jinesh, K.G. Gopchandran   +4 more
doaj   +1 more source

Spectroscopy of a tunable moiré system with a correlated and topological flat band

Nature Communications, 2021
Twisted double bilayer graphene hosts flat bands that can be tuned with an electric field. Here, by using gate-tuned scanning tunneling spectroscopy, the authors demonstrate the tunability of the flat band and reveal spectral signatures of correlated ...
Xiaomeng Liu, Cheng-Li Chiu, Jong Yeon Lee, Gelareh Farahi, Kenji Watanabe, Takashi Taniguchi, Ashvin Vishwanath, Ali Yazdani   +7 more
doaj   +1 more source

Engineering Negative Differential Conductance with the Cu(111) Surface State

, 2011
Low-temperature scanning tunneling microscopy and spectroscopy are employed to investigate electron tunneling from a C60-terminated tip into a Cu(111) surface.
B. W. Heinrich, D.-J. Choi, L. Limot, M. V. Rastei, R. L. Carter, T. Frederiksen   +5 more
core   +1 more source

Evidence of a spin resonance mode in the iron-based superconductor Ba(0.6)K(0.4)Fe2As2 from scanning tunneling spectroscopy. [PDF]

Physical Review Letters, 2012
We used high-resolution scanning tunneling spectroscopy to study the hole-doped iron pnictide superconductor Ba(0.6)K(0.4)Fe(2)As(2) (T(c)=38 K). Features of a bosonic excitation (mode) are observed in the measured quasiparticle density of states.
L. Shan, Jing Gong, Yong-Lei Wang, B. Shen, Xing-yuan Hou, C. Ren, Chunhong Li, Huan Yang, H. Wen, Shiliang Li, P. Dai   +10 more
semanticscholar   +1 more source

Ultrastable Photoactive Halide Perovskite Nanocrystal‐Sensitized SnO2 Nanorods for Room‐Temperature NO2 Detection

Advanced Functional Materials, EarlyView.
ABSTRACT Metal oxide (MOx)‐based NO2 gas sensors typically require high temperatures or ultraviolet light, limiting their practical use. To enable visible‐light activation at room temperature, efficient and stable photosensitizers should be integrated with nanostructured MOx hosts.
Yeonji Yuk, Dokyum Kim, Jun‐Cheol Park, Yoonsung Jung, Inhyeok Oh, Donghyeon Lee, Yejoon Kim, Ji‐Eun Yeo, Young Min Song, Chang‐Lyoul Lee, Sanghan Lee   +10 more
wiley   +1 more source

Direct observation of ordered configurations of hydrogen adatoms on graphene

, 2014
Ordered configurations of hydrogen adatoms on graphene have long been proposed, calculated and searched for. Here we report direct observation of several ordered configurations of H adatoms on graphene by scanning tunneling microscopy. On the top side of
Duerr, Michael, Feng, Yexin, Hu, Zonghai, Huang, Xiangqian, Li, Xin-Zheng, Lin, Chenfang, Wang, Enge, Xiao, Yingdong, Xu, Xiaozhi, Zhao, Ruguang   +9 more
core   +1 more source

Reversible hydrogenation and bandgap opening of graphene and graphite surfaces probed by scanning tunneling spectroscopy. [PDF]

Small, 2012
The effects of hydrogenation on the topography and electronic properties of graphene and graphite surfaces are studied by scanning tunneling microscopy and spectroscopy. The surfaces are chemically modified using an Ar/H(2) plasma. By analyzing thousands
A. Castellanos-Gómez, M. Wojtaszek, Arramel, N. Tombros, Bart J van Wees   +4 more
semanticscholar   +1 more source