Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Douglas A. A. Ohlberg"'
Autor:
Douglas A. A. Ohlberg, Diego Tami, Andreij C. Gadelha, Eliel G. S. Neto, Fabiano C. Santana, Daniel Miranda, Wellington Avelino, Kenji Watanabe, Takashi Taniguchi, Leonardo C. Campos, Jhonattan C. Ramirez, Cássio Gonçalves do Rego, Ado Jorio, Gilberto Medeiros-Ribeiro
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
Here, the authors image twisted bilayer graphene using scanning microwave imaging microscopy, revealing structures with sizes down to 1 nm. They show that is possible by using spontaneously forming nanoscale water menisci that concentrates the microw
Externí odkaz:
https://doaj.org/article/7774f8a91c664429a2e60a6ad688e01f
Autor:
Ado Jorio, Jessica S. Lemos, Rafael Nadas, Vinícius Ornelas, Fabiano C. Santana, Luiz Gustavo Cançado, Pedro Venezuela, Takashi Taniguchi, Gilberto Medeiros-Ribeiro, G. S. N. Eliel, Leonardo C. Campos, Andreij C. Gadelha, Cassiano Rabelo, Douglas A. A. Ohlberg, Kenji Watanabe, Daniel Miranda
Publikováno v:
ACS Applied Nano Materials. 4:1858-1866
Twisted bilayer heterostructures (TBHs) are materials whose physical properties depend on the twist angle between the two layers of two-dimensional (2D) materials. Those heterostructures are not fo...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68c5b32db7fc4467026f96e4d3e6fad9
https://doi.org/10.1021/acsanm.0c03230
https://doi.org/10.1021/acsanm.0c03230
Autor:
Tiago C Barbosa, Andreij C Gadelha, Douglas A A Ohlberg, Kenji Watanabe, Takashi Taniguchi, Gilberto Medeiros-Ribeiro, Ado Jorio, Leonardo C Campos
In this work, we study the Raman spectra of twisted bilayer graphene samples as a function of their twist-angles (θ), ranging from 0.03° to 3.40°, where local θ are determined by analysis of their associated moiré superlattices, as imaged by sca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ef3d49ba54e48b26944ca57199ecaf2
http://arxiv.org/abs/2201.01762
http://arxiv.org/abs/2201.01762
Autor:
Diego Tami, Douglas A. A. Ohlberg, Jhonattan C. Ramirez, Cássio Gonçalves do Rego, Gilberto Medeiros-Ribeiro
Publikováno v:
Conference on Lasers and Electro-Optics.
In this work, we analyzed numerically a multiscale nanosystem based on sMIM on TBG. Spontaneous formation of a water-meniscus by the approximation between the tip-sample concentrates the microwave fields, reaching resolutions of up to 1nm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eed9fdf177e5d64c30c2bdde653d83d6
https://doi.org/10.1364/cleo_at.2022.jw3a.6
https://doi.org/10.1364/cleo_at.2022.jw3a.6
Autor:
Diego Camilo Tami Lopez, Brian Giraldo, Cassio G. Rego, Jhonattan C. Ramirez, Douglas A. A. Ohlberg, Gilberto Medeiros-Ribeiro, Nobuhiko P. Kobayashi
Publikováno v:
Low-Dimensional Materials and Devices 2021.
Synthesis of novel material often times requires novel analysis and characterization techniques. The possibility of combining sputtering (SPU) and Atomic Layer Deposition (ALD) in the same chamber, Sputtering Atomic Layer Augmented Deposition (SALAD)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b17e21b1abc9e7cc14c2d987202b551
https://doi.org/10.1117/12.2596798
https://doi.org/10.1117/12.2596798
Autor:
Gilberto Medeiros-Ribeiro, Eliel G. S. Neto, Luiz Gustavo Cançado, Dawid Paszko, Kenji Watanabe, Daniel Miranda, Vincent Meunier, Takashi Taniguchi, Jessica S. Lemos, Benoit Van Troeye, Cassiano Rabelo, Thiago L. Vasconcelos, Leonardo C. Campos, Rafael Nadas, Michael Lamparski, Fabiano C. Santana, João Luiz Elias Campos, Vinícius Ornelas, Jean-Christophe Charlier, Douglas A. A. Ohlberg, Ado Jorio, Viet-Hung Nguyen, Andreij C. Gadelha
Publikováno v:
Nature, Vol. 590, p. 405-409 (2021)
Nature
Nature
Twisted bilayer graphene is created by slightly rotating the two crystal networks in bilayer graphene with respect to each other. For small twist angles, the material undergoes a self-organized lattice reconstruction, leading to the formation of a pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42cbb28571493d86cda9c213068ab5dd
https://hdl.handle.net/2078.1/237667
https://hdl.handle.net/2078.1/237667
Autor:
Diego Camilo Tami Lopez, Douglas A. A. Ohlberg, Jesús Álvarez Guerrero, Jhonattan C. Ramirez, Wellington Avelino, Gilberto Medeiros-Ribeiro, Nobuhiko P. Kobayashi, Brian Giraldo, Cassio G. Rego
Publikováno v:
Low-Dimensional Materials and Devices 2020.
Here we present advances in the use of near field microwaves, in both high-resolution microwave microscopy of nanostructured materials, as well as on the processing of materials with high microwave power density in selected areas. For the former, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddba2e59df9f17ecdc017d610bdbcb4f
https://doi.org/10.1117/12.2570708
https://doi.org/10.1117/12.2570708
Autor:
Douglas A. A. Ohlberg, Leonardo C. Campos, Gilberto Medeiros-Ribeiro, Ado Jorio, Eliel G. S. Neto, Diego Tami, Wellington Avelino, Kenji Watanabe, Daniel Miranda, Jhonattan C. Ramirez, Takashi Taniguchi, Fabiano C. Santana, Cassio G. Rego, Andreij C. Gadelha
Publikováno v:
Nature Communications
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
Molecular and atomic imaging required the development of electron and scanning probe microscopies to surpass the physical limits dictated by diffraction. Nano-infrared experiments and pico-cavity tip-enhanced Raman spectroscopy imaging later demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7db01573d8f1759b96a1760aa5a9f459
https://pubmed.ncbi.nlm.nih.gov/34016995
https://pubmed.ncbi.nlm.nih.gov/34016995
Autor:
Leonardo Fonseca, Bernardo L. Marques, Wellington Avelino, Douglas A. A. Ohlberg, Gilberto Medeiros-Ribeiro
Publikováno v:
Low-Dimensional Materials and Devices 2019.
At the limits of physical representation of bits, novel opportunities arise, in particular leveraging the granular nature of charges, photons and atoms. One interesting application is the generation of truly random numbers. The need of a true random
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::286edd7142cd89a0659c5fa1b44043aa
https://doi.org/10.1117/12.2530563
https://doi.org/10.1117/12.2530563
Autor:
Yuanrui Li, Huan Zhao, Wei Wu, Ping-Heng Tan, Wei Shi, Han Wang, Jiang-Bin Wu, Douglas A. A. Ohlberg
Publikováno v:
Advanced Optical Materials. 4:756-762
Two-dimensional Molybdenum Disulfide (MoS2) has shown promising prospects for the next generation electronics and optoelectronics devices. The monolayer MoS2 can be patterned into quasi-one-dimensional anisotropic MoS2 nanoribbons (MNRs), in which th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::486af52b4255ceabb218e29851512896
https://doi.org/10.1002/adom.201500707
https://doi.org/10.1002/adom.201500707