scholarly journals The critical role of hydroxyl groups in water vapor sensing of graphene oxide

2019 ◽  
Vol 1 (4) ◽  
pp. 1319-1330 ◽  
Author(s):  
Qawareer Fatima ◽  
Azhar Ali Haidry ◽  
Zhengjun Yao ◽  
Yue He ◽  
Zhong Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Vapor ◽  
Critical Role ◽  
Sensor Response ◽  
Hydroxyl Groups ◽  
Humidity Sensors ◽  
Vapor Sensing ◽  
Conceptual Advance

The present study provides a significant conceptual advance in graphene oxide based humidity sensors. It is found that sensor response is directly dependent on the amount of OH− groups. The proposed strategy to control OH− in this report can make significant impact on the development of future smart GO-based humidity sensors and should be applicable to other gases.

scholarly journals Nanoscale J-aggregates of poly(3-hexylthiophene): key to electronic interface interactions with graphene oxide as revealed by KPFM

Nanoscale ◽  
2019 ◽  
Vol 11 (23) ◽  
pp. 11202-11208 ◽  
Author(s):  
Elisa Palacios-Lidón ◽  
Emin Istif ◽  
Ana M. Benito ◽  
Wolfgang K. Maser ◽  
Jaime Colchero
Keyword(s):  
Graphene Oxide ◽  
Critical Role ◽  
Aggregate Structure ◽  
J Aggregates ◽  
Electronic Interface

KPFM reveals the critical role of the aggregate structure in P3HT for achieving efficient phototransport properties in P3HT-GO ensembles.

scholarly journals P1NM.17 - Functional Graphene oxide and role of hydroxyl groups on humidity sensing

2018 ◽  
Author(s):  
A. A. Haidry ◽  
Q. Fatima ◽  
L. Sun ◽  
Z. Li ◽  
L. Xie ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydroxyl Groups ◽  
Humidity Sensing ◽  
Functional Graphene Oxide

Nonisocyanate Thermoplastic Polyhydroxyurethane Elastomers via Cyclic Carbonate Aminolysis: Critical Role of Hydroxyl Groups in Controlling Nanophase Separation

2016 ◽  
Vol 5 (4) ◽  
pp. 424-429 ◽  
Author(s):  
Emily K. Leitsch ◽  
Goliath Beniah ◽  
Kun Liu ◽  
Tian Lan ◽  
William H. Heath ◽  
...  
Keyword(s):  
Critical Role ◽  
Cyclic Carbonate ◽  
Hydroxyl Groups ◽  
Nanophase Separation

The critical role of bulk density of graphene oxide in tuning its defect concentration through microwave-driven annealing

2018 ◽  
Vol 27 (5) ◽  
pp. 1468-1474
Author(s):  
Isao Ogino ◽  
Go Fukazawa ◽  
Shunsuke Kamatari ◽  
Shinichiroh Iwamura ◽  
Shin R. Mukai
Keyword(s):  
Graphene Oxide ◽  
Bulk Density ◽  
Critical Role ◽  
Defect Concentration

scholarly journals On the Role of γ-Fe2O3 Nanoparticles and Reduced Graphene Oxide Nanosheets in Enhancing Self-Cleaning Properties of Composite TiO2 for Cultural Heritage Protection

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 933
Author(s):  
Maryam Mokhtarifar ◽  
Reyhaneh Kaveh ◽  
Marco Ormellese ◽  
Mojtaba Bagherzadeh ◽  
Maria Vittoria Diamanti ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Acid Rain ◽  
Reduced Graphene Oxide ◽  
Crack Density ◽  
Hydroxyl Groups ◽  
Fe2o3 Nanoparticles ◽  
Tio2 Anatase ◽  
Reduced Graphene ◽  
Self Cleaning

The durability of novel metallic artifacts and buildings is an open issue, and the role of smart protecting coatings in extending these artifacts’ lifetimes is crucial. In this paper, the role of γ-Fe2O3 nanoparticles and reduced graphene oxide (rGO) nanosheets on enhancing the self-cleaning properties of composite TiO2 films and reducing metal alterations due to contact with acid rain and pollutants is investigated. The photocatalytic assessment of the TiO2 based films indicates that there are optimum contents for γ-Fe2O3 and rGO, which confer the film lower bandgap and tune the TiO2 anatase/rutile ratio. By adding a proper content of γ-Fe2O3, wettability is reduced both in dark and under illumination, which could be related to higher roughness. γ-Fe2O3 overloading causes increasing crack density and eventually a fully cracked structure. Adding an appropriate amount of rGO causes a sharp increase in roughness, due to the stacking of rGO nanosheets, while simultaneously avoiding cracking. At higher contents of rGO, wettability further decreases due to higher amounts of hydroxyl groups bound onto rGO; also in this case, overloading causes film cracking. Evaluation of self-cleaning performance and discoloration resistance under soiling and acid rain simulated tests demonstrates that proper loadings of γ-Fe2O3 and rGO present higher efficiency thanks to higher superhydrophilic tendency and higher photocatalytic activities, as well as an efficient barrier effect.

Crystallization time in ZnO: the role of surface OH groups in its photoactivity

2020 ◽  
Vol 44 (42) ◽  
pp. 18216-18224
Author(s):  
Jéssica C. de Almeida ◽  
Mateus T. Corrêa ◽  
Rafaella H. Koga ◽  
Douglas M. S. Del Duque ◽  
Osmando F. Lopes ◽  
...  
Keyword(s):  
Critical Role ◽  
Surface Modifications ◽  
Crystallization Time ◽  
Hydroxyl Groups ◽  
Surface Groups ◽  
Oh Groups

The crystallization time and surface modifications concerning the hydroxyl groups on the ZnO catalyst were studied and the results suggest that there is a balance between the surface groups and morphology playing a critical role in its photoactivity.

The Role of the SLP in Autism Spectrum Disorder Screening and Assessment

2008 ◽  
Vol 15 (2) ◽  
pp. 50-59 ◽  
Author(s):  
Amy Philofsky
Keyword(s):  
Language Development ◽  
Critical Role ◽  
Children With Autism ◽  
Autism Spectrum ◽  
Children With Asd ◽  
Prevalence Estimates ◽  
Notable Increase ◽  
Screening Assessment ◽  
Critical Components

AbstractRecent prevalence estimates for autism have been alarming as a function of the notable increase. Speech-language pathologists play a critical role in screening, assessment and intervention for children with autism. This article reviews signs that may be indicative of autism at different stages of language development, and discusses the importance of several psychometric properties—sensitivity and specificity—in utilizing screening measures for children with autism. Critical components of assessment for children with autism are reviewed. This article concludes with examples of intervention targets for children with ASD at various levels of language development.

A critical role of iNOS-derived Nitric Oxide (NO) and progesterone in implantation

1998 ◽  
Vol 5 (1) ◽  
pp. 115A-115A
Author(s):  
K CHWALISZ ◽  
E WINTERHAGER ◽  
T THIENEL ◽  
R GARFIELD
Keyword(s):  
Nitric Oxide ◽  
Critical Role
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