Influence of Surface Chemistry on Water Absorption in Functionalized Germanane
- Thaddeus J. AselThaddeus J. AselDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesDepartment of Electrical and Computer Engineering, The Ohio State University, 2015 Neil Avenue, Columbus, Ohio 43210, United StatesMore by Thaddeus J. Asel
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- Warren L. B. HueyWarren L. B. HueyDepartment of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, United StatesMore by Warren L. B. Huey
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- Brenton NoesgesBrenton NoesgesDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesDepartment of Electrical and Computer Engineering, The Ohio State University, 2015 Neil Avenue, Columbus, Ohio 43210, United StatesMore by Brenton Noesges
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- Egle MolotokaiteEgle MolotokaiteCenter for NanoScience and Technology at PoliMi, Istituto Italiano de Technologia, via Pascoli 70/3, 20133 Milano, ItalyMore by Egle Molotokaite
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- Szu-Chia ChienSzu-Chia ChienDepartment of Materials Science and Engineering, The Ohio State University, 2041 N. College Road, Columbus, Ohio 43210, United StatesMore by Szu-Chia Chien
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- Yaxian WangYaxian WangDepartment of Materials Science and Engineering, The Ohio State University, 2041 N. College Road, Columbus, Ohio 43210, United StatesMore by Yaxian Wang
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- Aldriel BarnumAldriel BarnumDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesDepartment of Electrical and Computer Engineering, The Ohio State University, 2015 Neil Avenue, Columbus, Ohio 43210, United StatesMore by Aldriel Barnum
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- Chris McPhersonChris McPhersonDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesMore by Chris McPherson
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- Shishi JiangShishi JiangDepartment of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, United StatesMore by Shishi Jiang
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- Seth ShieldsSeth ShieldsDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesMore by Seth Shields
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- Cosimo D’AndreaCosimo D’AndreaCenter for NanoScience and Technology at PoliMi, Istituto Italiano de Technologia, via Pascoli 70/3, 20133 Milano, ItalyDepartment of Physics, Politecnico di Milano, P.za L. da Vinci 32, 20133 Milano, ItalyMore by Cosimo D’Andrea
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- Wolfgang WindlWolfgang WindlDepartment of Materials Science and Engineering, The Ohio State University, 2041 N. College Road, Columbus, Ohio 43210, United StatesMore by Wolfgang Windl
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- Eugenio Cinquanta*Eugenio Cinquanta*(E.C.) Email: [email protected]Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, 20133 Milano, ItalyMore by Eugenio Cinquanta
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- Leonard J. BrillsonLeonard J. BrillsonDepartment of Physics, The Ohio State University, 191 W. Woodruff Avenue, Columbus, Ohio 43210, United StatesDepartment of Electrical and Computer Engineering, The Ohio State University, 2015 Neil Avenue, Columbus, Ohio 43210, United StatesMore by Leonard J. Brillson
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- Joshua E. Goldberger*Joshua E. Goldberger*(J.E.G.) Email: [email protected]Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, United StatesMore by Joshua E. Goldberger
Abstract
The graphane analogues of group 14 are a unique family of 2D materials due to the necessity of a terminal ligand for stability. Here we highlight how changing the surface ligand can lead to nonobvious interactions with other chemical species. We show using XRD, FTIR, and TGA that GeCH3 reversibly absorbs water into the van der Waals space, whereas GeH does not intercalate water. Molecular dynamics and density functional theory simulations predict that water datively interacts with the Ge–C σ* pocket on the Ge framework, resulting in local structural distortions. Surprisingly, these distortions give rise to an intense above band gap luminescence state of 1.87 eV, with an average lifetime of hundreds of picoseconds. This work opens potential applications for exploiting surface functionalization chemistry of 2D materials to create membrane and separation technologies.
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