Results 1 to 10 of about 1,547,483 (263)

Chiral Porphyrin Assemblies Investigated by a Modified Reflectance Anisotropy Spectroscopy Spectrometer [PDF]

Molecules, 2023
Reflectance anisotropy spectroscopy (RAS) has been largely used to investigate organic compounds: Langmuir–Blodgett and Langmuir–Schaeffer layers, the organic molecular beam epitaxy growth in situ and in real time, thin and ultrathin organic films ...
Ilaria Tomei, Beatrice Bonanni, Anna Sgarlata, Massimo Fanfoni, Roberto Martini, Ilaria Di Filippo, Gabriele Magna, Manuela Stefanelli, Donato Monti, Roberto Paolesse, Claudio Goletti   +10 more
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Review: An Optical Surface Probe by Reflectance Anisotropy Spectroscopy [PDF]

Hittite Journal of Science and Engineering, 2019
Rface and interface information. RAS measures the difference in reflectance of light eflectance anisotropy spectroscopy RAS is an optical technique to produce surlinearly polarised along two orthogonal axes in the surface at near normal incidence as ...
Orhan Zeybek
doaj   +6 more sources

Precise in situ etch depth control of multilayered III−V semiconductor samples with reflectance anisotropy spectroscopy (RAS) equipment [PDF]

Beilstein Journal of Nanotechnology, 2016
Reflectance anisotropy spectroscopy (RAS) equipment is applied to monitor dry-etch processes (here specifically reactive ion etching (RIE)) of monocrystalline multilayered III–V semiconductors in situ. The related accuracy of etch depth control is better
Ann-Kathrin Kleinschmidt, Lars Barzen, Johannes Strassner, Christoph Doering, Henning Fouckhardt, Wolfgang Bock, Michael Wahl, Michael Kopnarski   +7 more
doaj   +3 more sources

Doped or Quantum-Dot Layers as In Situ Etch-Stop Indicators for III/V Semiconductor Reactive Ion Etching (RIE) Using Reflectance Anisotropy Spectroscopy (RAS) [PDF]

Micromachines, 2021
Reflectance anisotropy spectroscopy (RAS), which was originally invented to monitor epitaxial growth, can—as we have previously shown—also be used to monitor the reactive ion etching of III/V semiconductor samples in situ and in real time, as long as the
Guilherme Sombrio, Emerson Oliveira, Johannes Strassner, Johannes Richter, Christoph Doering, Henning Fouckhardt   +5 more
doaj   +2 more sources

In Situ Studies on the Influence of Surface Symmetry on the Growth of MoSe₂ Monolayer on Sapphire Using Reflectance Anisotropy Spectroscopy and Differential Reflectance Spectroscopy [PDF]

Nanomaterials
The surface symmetry of the substrate plays an important role in the epitaxial high-quality growth of 2D materials; however, in-depth and in situ studies on these materials during growth are still limited due to the lack of effective in situ monitoring ...
Yufeng Huang, Mengjiao Li, Zhixin Hu, Chunguang Hu, Wanfu Shen, Yanning Li, Lidong Sun   +6 more
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In Situ Optical Monitoring and Morphological Evolution of Si Nanowires Grown on Faceted Al₂O₃(0001) Substrates [PDF]

Nanomaterials
This paper presents the growth and in situ optical characterization of silicon nanowires (Si NWs) on Al2O3(0001) substrates that are thermally faceted using the atomic low angle shadowing technique (ATLAS) method. Annealing Al2O3 substrates in air before
Olzat Toktarbaiuly, Mergen Zhazitov, Muhammad Abdullah, Yerbolat Tezekbay, Nazerke Kydyrbay, Nurxat Nuraje, Tolagay Duisebayev   +6 more
doaj   +2 more sources

Polarized optical contrast spectroscopy of in plane anisotropic van der Waals materials [PDF]

Scientific Reports
Polarized optical contrast spectroscopy is a simple and non-destructive approach to characterize the crystalline anisotropy and orientation of two-dimensional materials.
Ernst Knöckl, Alexandre Bernard, Alexander Holleitner, Christoph Kastl   +3 more
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Optical anisotropy of pristine and reduced V2O5(010) [PDF]

Scientific Reports
The optical anisotropy of pristine and reduced single crystalline (010) orientated $$\hbox {V}_{2}\hbox {O}_{5}$$ is presented. The reduction of $$\hbox {V}_{2}\hbox {O}_{5}$$ is complex due to the abundance of V-O phases, strong dependence on the ...
Brian Walls, Oisín Murtagh, Chris M. Smith, Daragh Mullarkey, Dmitry Shulyatev, Karsten Fleischer, Ainur Zhussupbekova, Igor V. Shvets   +7 more
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Impact of Radiometric Variability on Ultra-High Resolution Hyperspectral Imagery Over Aquatic Vegetation: Preliminary Results

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Over the last two decades, advancements in airborne imaging spectroscopy have prompted the exploitation of lightweight drones for detailed vegetation assessment at unprecedented resolutions.
Erika Piaser, Andrea Berton, Rossano Bolpagni, Michele Caccia, Maria Beatrice Castellani, Andrea Coppi, Alice Dalla Vecchia, Francesca Gallivanone, Giovanna Sona, Paolo Villa   +9 more
doaj   +1 more source

Optical Anisotropy of Porphyrin Nanocrystals Modified by the Electrochemical Dissolution

Molecules, 2022
Reflectance anisotropy spectroscopy (RAS) coupled to an electrochemical cell represents a powerful tool to correlate changes in the surface optical anisotropy to changes in the electrochemical currents related to electrochemical reactions.
Rossella Yivlialin, Claudia Filoni, Francesco Goto, Alberto Calloni, Lamberto Duò, Franco Ciccacci, Gianlorenzo Bussetti   +6 more
doaj   +1 more source