Excitation Wavelength Dependence of Combined Surface- and Graphene-Enhanced Raman Scattering Experienced by Free-Base Phthalocyanine Localized on Single-Layer Graphene-Covered Ag Nanoparticle Arrays

2018 ◽  
Vol 122 (36) ◽  
pp. 20850-20860 ◽  
Author(s):  
Veronika Sutrová ◽  
Ivana Šloufová ◽  
Peter Mojzeš ◽  
Zuzana Melníková ◽  
Martin Kalbáč ◽  
...  
Keyword(s):  
Single Layer ◽  
Wavelength Dependence ◽  
Single Layer Graphene ◽  
Excitation Wavelength ◽  
Nanoparticle Arrays ◽  
Ag Nanoparticle ◽  
Free Base ◽  
Layer Graphene ◽  
Enhanced Raman Scattering ◽  
Excitation Wavelength Dependence

Raman excitation profiles of hybrid systems constituted by single-layer graphene and free base phthalocyanine: Manifestations of two mechanisms of graphene-enhanced Raman scattering

2017 ◽  
Vol 48 (10) ◽  
pp. 1270-1281 ◽  
Author(s):  
Tereza Uhlířová ◽  
Peter Mojzeš ◽  
Zuzana Melniková ◽  
Martin Kalbáč ◽  
Veronika Sutrová ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Hybrid Systems ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Free Base ◽  
Layer Graphene ◽  
Enhanced Raman Scattering ◽  
Raman Excitation Profiles

Effect of Ethanethiolate Spacer on Morphology and Optical Responses of Ag Nanoparticle Array–Single Layer Graphene Hybrid Systems

Langmuir ◽  
2017 ◽  
Vol 33 (50) ◽  
pp. 14414-14424 ◽  
Author(s):  
Veronika Sutrová ◽  
Ivana Šloufová ◽  
Zuzana Melníková ◽  
Martin Kalbáč ◽  
Ewa Pavlova ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Nanoparticle Array ◽  
Ag Nanoparticle ◽  
Layer Graphene ◽  
Optical Responses

Comparative study of electron transfer on various graphene-metallic contacts

2019 ◽  
Vol 33 (31) ◽  
pp. 1950384
Author(s):  
Di Lu ◽  
Yu-E Yang ◽  
Weichun Zhang ◽  
Caixia Wang ◽  
Jining Fang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Single Layer ◽  
Annealing Treatment ◽  
Single Layer Graphene ◽  
Strain Effect ◽  
Graphene Surface ◽  
Layer Graphene ◽  
Metallic Contacts ◽  
Nonuniform Strain ◽  
Main Factor

We have investigated Raman spectra of the G and 2D lines of a single-layer graphene (SLG) with metallic contacts. The shift of the G and 2D lines is correlated to two different factors. Before performing annealing treatment or annealing under low temperature, the electron transfer on graphene surface is dominated by nonuniform strain effect. As the annealing treatment is enhanced, however, a suitable annealing treatment can eliminate the nonuniform strain effect where the relative work function (WF) between graphene and metal becomes a main factor to determine electronic transfer. Moreover, it is confirmed that the optimized annealing treatment can also decrease effectively the structural defect and induced disorder in graphene due to metallic contacts.

Hybrid dye sensitized solar cell based on single layer graphene quantum dots

2020 ◽  
Vol 175 ◽  
pp. 108118 ◽  
Author(s):  
Farhad Jahantigh ◽  
S.M. Bagher Ghorashi ◽  
Amir Bayat
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Graphene Quantum Dots ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Layer Graphene

scholarly journals Millisecond lattice gasification for high-density CO2- and O2-sieving nanopores in single-layer graphene

2021 ◽  
Vol 7 (9) ◽  
pp. eabf0116
Author(s):  
Shiqi Huang ◽  
Shaoxian Li ◽  
Luis Francisco Villalobos ◽  
Mostapha Dakhchoune ◽  
Marina Micari ◽  
...  
Keyword(s):  
Single Layer ◽  
High Density ◽  
Single Layer Graphene ◽  
Pore Density ◽  
Vacancy Defects ◽  
Carbon Gasification ◽  
Layer Graphene ◽  
Gas Molecules ◽  
Good Agreement

Etching single-layer graphene to incorporate a high pore density with sub-angstrom precision in molecular differentiation is critical to realize the promising high-flux separation of similar-sized gas molecules, e.g., CO2 from N2. However, rapid etching kinetics needed to achieve the high pore density is challenging to control for such precision. Here, we report a millisecond carbon gasification chemistry incorporating high density (>1012 cm−2) of functional oxygen clusters that then evolve in CO2-sieving vacancy defects under controlled and predictable gasification conditions. A statistical distribution of nanopore lattice isomers is observed, in good agreement with the theoretical solution to the isomer cataloging problem. The gasification technique is scalable, and a centimeter-scale membrane is demonstrated. Last, molecular cutoff could be adjusted by 0.1 Å by in situ expansion of the vacancy defects in an O2 atmosphere. Large CO2 and O2 permeances (>10,000 and 1000 GPU, respectively) are demonstrated accompanying attractive CO2/N2 and O2/N2 selectivities.

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