Imaging and spectrum of monolayer graphene oxide in external electric field

Gao, Yan; Qin, Chengbing; Qiao, Zhixing; Wang, Bao-Tian; Li, Weidong; Zhang, Guofeng; Chen, Ruiyun; Liu, Xiao; Jia, Suotang

doi:10.1016/j.carbon.2015.05.106

Cited by 17 publications

(3 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in figure 5(a), for the thinner film (1-2 layers), the band gap is barely affected by the electric field. This is different to Sc 2 CO 2 MXenes, MoS 2 , graphene monolayers and bilayers, their electronic structures indeed obviously depend on the applying electric field [47][48][49][50]. The band gap of 3-10 layers Sb 2 Se 3 gradually decreases as the increase of electric field.…”

Section: Electric Field Effectmentioning

confidence: 84%

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃

Ding¹,

Li²

2021

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Antimony selenide, Sb2Se3, has been attracted widespread attention in photovoltaic applications due to its high absorption coefficient and suitable band gap. However, the influence of uniaxial strain and electric field on the electronic and photovoltaic properties of multilayer Sb2Se3 is still unknown. Here, the quantitative relationship, such as strain-property, electric field-property, as well as thickness-property, is explored via first-principles calculations. Our results demonstrate that the band gap and photovoltaic parameters (Jsc, Voc, FF and PCE) of multilayer Sb2Se3 are not only affected by the uniaxial strain and electric field, but can also be tuned via the coupling of thickness with strain and electric field. The band-gap of multilayer Sb2Se3 is linear dependent on uniaxial strain and external electric field. We found that the effect of strain on the photovoltaic parameters could be negligible as compared with the effect of thickness. However, the effect of electric field is thickness dependent, 1 ‒ 2 layer(s) thin films are not affected while the impact of electric field increases with the increasing thickness. The quantitative strain (electric field)-properties relation of multilayer Sb2Se3 suggesting that Sb2Se3 films have a potential application in the field of strain and electric field sensors.

show abstract

Section: Electric Field Effectmentioning

confidence: 84%

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃

Ding¹,

Li²

2021

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…[2,3] Nowadays relevant insights about these features are well documented in the literature, whereas others remain little explored or controversial. [14] Moreover, GO thickness has been reported to be crucial in laser energy absorption capabilities and laser energy transfer for efficient laser desorption/ionization mass spectrometry analysis. spin-coating methods, layer-by-layer assembly or patterning through wax-printed membranes.…”

Section: The Number Of Layers Lateral Size and Oxidation Degree Of mentioning

confidence: 99%

Graphene Oxide as an Optical Biosensing Platform: A Progress Report

2018

View full text Add to dashboard Cite

IntroductionAs a 2D material, graphene oxide (GO) is a lattice-like nanostructure of hexagonal carbon rings disrupted by oxygen-containing moieties. In 2012, we discussed the outstanding physicochemical properties offered by GO and how these features can be exploited in unprecedented optical biosensing systems. [1] In fact, GO can be processed in suspension, easily complexed with biomolecules, and offers a universal highly efficient long-range photoluminescence quenching agent-among other functional properties. Furthermore, we highlighted that GO photoluminescences with energy transfer donor/acceptor molecules exposed A few years ago, crucial graphene oxide (GO) features such as the carbon/oxygen ratio, number of layers, and lateral size were scarcely investigated and, thus, their impact on the overall optical biosensing performance was almost unknown. Nowadays valuable insights about these features are well documented in the literature, whereas others remain controversial. Moreover, most of the biosensing systems based on GO were amenable to operating as colloidal suspensions. Currently, the literature reports conceptually new approaches obviating the need of GO colloidal suspensions, enabling the integration of GO onto a solid phase and leading to their application in new biosensing devices. Furthermore, most GO-based biosensing devices exploit photoluminescent signals. However, further progress is also achieved in powerful label-free optical techniques exploiting GO in biosensing, particularly using optical fibers, surface plasmon resonance, and surface enhanced Raman scattering. Herein, a critical overview on these topics is offered, highlighting the key role of the physicochemical properties of GO. New challenges and opportunities in this exciting field are also highlighted.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201805043.in a planar surface. [1] However, GO properties can be tailored according to its oxidation degree, lateral size, and number of layers, which was something little explored 6 years ago, and thus their impact on the overall biosensing performance was almost unknown. In addition, most of the biosensing systems based on GO were amenable to working as colloidal suspensions. Though, recent literature reports conceptually new approaches obviating the need of colloidal suspensions, which facilitates integration of GO-based biosensors into the solid phase and allows for their applications in new devices. Furthermore, the majority of the GO-based optical biosensing techniques rely on photoluminescent signals. However, further progress has also been achieved in powerful label-free optical techniques exploiting GO in biosensing. Here, we introduce a progress report on this exciting topic, underscoring challenges and opportunities in (bio)sensing accordingly. Number of LayersGO aqueous suspensions are highly stable in the form of mono layers. However, GO multilayer films can be built via

show abstract

“…Experimentally, it was measured that GO sheets show a wide range of tensile strength (around 10-33 GPa) [18][19][20][21][22], originating from the fact that GOs are complex nanostructures. However, previous studies revealed that monolayer GOs show superior optoelectronic, electromechanical and mechanical properties over multilayer GOs [23][24][25][26][27][28]. Therefore, monolayer GOs are desirable as building blocks for the next generation of engineered materials.…”

Section: Introductionmentioning

confidence: 99%

Machine learning assisted insights into the mechanical strength of nanocrystalline graphene oxide

Shi

Zhou

et al. 2022

2D Mater.

View full text Add to dashboard Cite

The mechanical properties of graphene oxides (GOs) are of great importance for their practical applications. Herein, extensive first-principles-based ReaxFF molecular dynamics (MD) simulations predict the wrinkling morphology and mechanical properties of nanocrystalline graphene oxides (NCGOs), with intricate effects of grain size, oxidation, hydroxylation, epoxidation, grain boundary (GB) hydroxylation, GB epoxidation, GB oxidation being considered. NCGOs show brittle failures initiating at GBs, obeying the weakest link principle. By training the MD data, four machine learning (ML) models are developed with capability in estimating the tensile strength of NCGOs, with sorting as Extreme Gradient Boosting (XGboost) > Multilayer Perceptron (MLP) > Gradient Boosting Decision Tree (GBDT) > Random Forest (RF). In the XGboot model, it is revealed that the strength of NCGOs is greatly dictated by oxidation and grain size, and the hydroxyl group plays more critical role in the strength of NCGOs than the epoxy group. These results uncover the pivotal roles of structural signatures in the mechanical strength of NCGOs, and provide critical guidance for mechanical designs of chemically-functionalized nanostructures.

show abstract

Imaging and spectrum of monolayer graphene oxide in external electric field

Cited by 17 publications

References 43 publications

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃

Graphene Oxide as an Optical Biosensing Platform: A Progress Report

Machine learning assisted insights into the mechanical strength of nanocrystalline graphene oxide

Contact Info

Product

Resources

About

Imaging and spectrum of monolayer graphene oxide in external electric field

Cited by 17 publications

References 43 publications

Strain and electric field tunable photoelectric properties of multilayer Sb2Se3

Strain and electric field tunable photoelectric properties of multilayer Sb2Se3

Graphene Oxide as an Optical Biosensing Platform: A Progress Report

Machine learning assisted insights into the mechanical strength of nanocrystalline graphene oxide

Contact Info

Product

Resources

About

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃

Strain and electric field tunable photoelectric properties of multilayer Sb₂Se₃