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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Improvement from Discrete to Uniform Wetting of Organic Perovskite on Ferromagnetic Metals Through a Heterointerface
Shih-Yu Liu,Zih-En Lin,Bingyuan Wu,Tingting Chen,Hsuan Ching Hung,Chun-Han Yin,Chun-Tse Hsieh,Chak Ming Liu,L. Liaw,Sheng-Yu Hsu,Po Chun Chang,Yu Chiang Chao,Wen Chin Lin +12 more
Journal ArticleDOI
Surface free energy of graphene-based coatings and its component elements
TL;DR: In this paper , the surface free energy of graphite base, graphene, and graphene oxide is evaluated critically based on the provided contact angle data using a variety of techniques, such as the Zisman, Neumann, Fowkes, Owens-Wendt-Fowkes and van Oss, Chaudhury, Good method.
Journal ArticleDOI
Facile fabrication of robust self-cleaning fluorine-free reduced graphene oxide based superhydrophobic surfaces
Madhu Bala,Vickramjeet Singh +1 more
Posted Content
How water wets and self-hydrophilizes nanopatterns of physisorbed hydrocarbons
Diego Diaz,Ole Nickel,Nicolas Moraga,Rodrigo Catalan,Maria Jose Retamal,Hugo Zelada,Marcelo A Cisternas,Robert Meissner,Patrick Huber,Tomas P. Corrales,Ulrich G. Volkmann +10 more
TL;DR: In this paper, the authors present experiments and simulations on the wetting behavior of water on molecularly thin, self-assembled alkane carpets of dotriacontane (n-C32H66 or C32) physisorbed on the hydrophilic native oxide layer of silicon surfaces during dip-coating from a binary alkane solution.
Journal ArticleDOI
Laser ablative patterning of B4C and MoAlB ceramics for hydrophobic surfaces
Samuel Ruiz,Yong-Zoo Yoo,Xingyu Chen,Nan Li,Yongfeng Lu,Christopher J. Wohl,Valerie L. Wiesner,Bai Cui +7 more
TL;DR: In this article , a laser ablative patterning (LAP) process was used to increase the wetting contact angle of two ceramic materials, boron carbide (B4C) and molybdenum aluminum boride (MoAlB).
References
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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.