Journal ArticleDOI
Effect of airborne contaminants on the wettability of supported graphene and graphite
Zhiting Li,Yongjin Wang,Andrew Kozbial,Ganesh Shenoy,Feng Zhou,Rebecca McGinley,Patrick Ireland,Brittni Morganstein,Alyssa Kunkel,Sumedh P. Surwade,Lei Li,Haitao Liu +11 more
TLDR
It is demonstrated that airborne hydrocarbons adsorb on graphitic surfaces, and that a concurrent decrease in the water contact angle occurs when these contaminants are partially removed by both thermal annealing and controlled ultraviolet-O3 treatment.Abstract:
It is generally accepted that supported graphene is hydrophobic and that its water contact angle is similar to that of graphite Here, we show that the water contact angles of freshly prepared supported graphene and graphite surfaces increase when they are exposed to ambient air By using infrared spectroscopy and X-ray photoelectron spectroscopy we demonstrate that airborne hydrocarbons adsorb on graphitic surfaces, and that a concurrent decrease in the water contact angle occurs when these contaminants are partially removed by both thermal annealing and controlled ultraviolet-O3 treatment Our findings indicate that graphitic surfaces are more hydrophilic than previously believed, and suggest that previously reported data on the wettability of graphitic surfaces may have been affected by unintentional hydrocarbon contamination from ambient airread more
Citations
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Intrinsic hydrophilic character of carbon nanotube networks
TL;DR: In this article, it was shown that carbon nanotubes (CNTs) or graphene have an intrinsically hydrophilic nature and that the addition of liquid hydrocarbons or polycyclic aromatic compounds, which are the common side-products of nanocarbon syntheses, turned the otherwise water-sensitive CNT films hydrophobic.
Journal ArticleDOI
Water on BN doped benzene: A hard test for exchange-correlation functionals and the impact of exact exchange on weak binding
Yasmine S. Al-Hamdani,Yasmine S. Al-Hamdani,Dario Alfè,Dario Alfè,O. Anatole von Lilienfeld,O. Anatole von Lilienfeld,Angelos Michaelides,Angelos Michaelides +7 more
TL;DR: By exploiting the subtle binding between water and a boron and nitrogen doped benzene derivative (1,2-azaborine) it is shown how exact exchange can alter the binding conformation within a complex.
Journal ArticleDOI
The role of water models on the prediction of slip length of water in graphene nanochannels
TL;DR: Self-consistent comparisons of slip characteristics between the SPC, SPC/E, Spc/Fw, TIP3P, Tip4P, and TIP4P/2005 water models are demonstrated.
Journal ArticleDOI
The evolution in graphitic surface wettability with first-principles quantum simulations: the counterintuitive role of water
TL;DR: This study provides conclusive evidence to demonstrate the role played by water adsorption in the evolution of surface properties of aged graphite in ambient air and establishes the basis of the quantum surface wettability theory by combining two independent atomic-level quantum physics simulation methodologies.
Journal ArticleDOI
Wettability of colloid-imprinted carbons by contact angle kinetics and water vapor sorption measurements
Xiaoan Li,Dustin Banham,Fangxia Feng,Farisa Forouzandeh,Siyu Ye,Daniel Y. Kwok,Viola I. Birss +6 more
TL;DR: In this paper, CICs with different pore sizes were synthesized and heat treated at 1500°C under a N 2 atmosphere, showing that the as-synthesized CIC surfaces are much more hydrophilic when compared to commercial carbon black (Vulcan carbon, VC).
References
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Book
Physical chemistry of surfaces
TL;DR: In this paper, the authors discuss the nature and properties of liquid interfaces, including the formation of a new phase, nucleation and crystal growth, and the contact angle of surfaces of solids.
Journal ArticleDOI
Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
Xuesong Li,Weiwei Cai,Jinho An,Seyoung Kim,Junghyo Nah,Dongxing Yang,Richard D. Piner,Aruna Velamakanni,Inhwa Jung,Emanuel Tutuc,Sanjay K. Banerjee,Luigi Colombo,Rodney S. Ruoff +12 more
TL;DR: It is shown that graphene grows in a self-limiting way on copper films as large-area sheets (one square centimeter) from methane through a chemical vapor deposition process, and graphene film transfer processes to arbitrary substrates showed electron mobilities as high as 4050 square centimeters per volt per second at room temperature.
Journal ArticleDOI
High-yield production of graphene by liquid-phase exfoliation of graphite
Yenny Hernandez,Valeria Nicolosi,Mustafa Lotya,Fiona M. Blighe,Zhenyu Sun,Sukanta De,I.T. McGovern,Brendan Holland,Michele T. Byrne,Yurii K. Gun'ko,John J. Boland,Peter Niraj,Georg S. Duesberg,Satheesh Krishnamurthy,Robbie Goodhue,John L. Hutchison,Vittorio Scardaci,Andrea C. Ferrari,Jonathan N. Coleman +18 more
TL;DR: Graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone are demonstrated.
Journal ArticleDOI
Carbon-based Supercapacitors Produced by Activation of Graphene
Yanwu Zhu,Shanthi Murali,Meryl D. Stoller,K. J. Ganesh,Weiwei Cai,Paulo J. Ferreira,Adam Pirkle,Robert M. Wallace,Katie A. Cychosz,Matthias Thommes,Dong Su,Eric A. Stach,Rodney S. Ruoff +12 more
TL;DR: This work synthesized a porous carbon with a Brunauer-Emmett-Teller surface area, a high electrical conductivity, and a low oxygen and hydrogen content that has high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes.
Journal ArticleDOI
Monitoring dopants by Raman scattering in an electrochemically top-gated graphene transistor
Anindya Das,Simone Pisana,Biswanath Chakraborty,S. Piscanec,Srijan Kumar Saha,Umesh V. Waghmare,Kostya S. Novoselov,H. R. Krishnamurthy,Andre K. Geim,Andrea C. Ferrari,A. K. Sood +10 more
TL;DR: This work demonstrates a top-gated graphene transistor that is able to reach doping levels of up to 5x1013 cm-2, which is much higher than those previously reported.