Functionalisation and immobilisation of an Au(110) surface via uracil and 2-thiouracil anchored layer

Literature Information

Publication Date 2015-05-06
DOI 10.1039/C5CP01886B
Impact Factor 3.676
Authors

Oksana Plekan, Vitaliy Feyer, Andrew Cassidy, Victor Lyamayev, Nataliya Tsud, Sylwia Ptasińska, Sara Reiff, Rober G. Acres


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Abstract

We study surface functionalisation by uracil and 2-thiouracil, and immobilisation of several DNA moieties on functionalised gold surfaces. The combination of X-ray photoelectron and near-edge X-ray absorption spectroscopy allowed us to obtain a complete understanding of complex interfacial processes, starting from adsorption of biomolecules onto the metallic surface and progressing towards a specific surface functionality for interactions with other biologically related adsorbates. Au(110) surfaces were functionalised by deposition of uracil and 2-thiouracil molecules under vacuum conditions, and then tested for their selectivity by immobilisation of different DNA moieties deposited from aqueous solutions. We observed that adenine, adenosine, and RNA polymer (polyadenylic acid) from saturated solutions were immobilized successfully on the 2-thiouracil, but those from dilute (1%) solutions were not. However, cytosine failed to adsorb even from saturated solution. The chemical states of the biologically related adsorbates were investigated and the geometrical orientation of uracil and 2-thiouracil on the Au(110) surface was determined using both spectroscopic techniques.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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