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Single-molecule DNA conductance in water solutions: Role of DNA low-frequency dynamics
Starikov, E.B.,Quintilla, A.,Nganou, C.,Lee, K.H.,Cuniberti, G.,Wenzel, W. North Holland ; Elsevier Science Ltd 2009 Chemical physics letters Vol.467 No.4
Dependence of charge transmission through several experimentally studied DNA duplexes on their lowest-frequency acoustic modes, combined with the molecular dynamics in picosecond characteristic time range, has been studied. Based on this analysis we were able to identify the specific acoustic modes responsible for the noticeable increase in DNA charge transmission. Other factors influencing electric properties of DNA duplexes are discussed.
Electrical Conductance in Biological Molecules
Waleed Shinwari, M.,Jamal Deen, M.,Starikov, Evgeni B.,Cuniberti, Gianaurelio WILEY-VCH Verlag 2010 Advanced Functional Materials Vol.20 No.12
<P>Nucleic acids and proteins are not only biologically important polymers. They have recently been recognized as novel functional materials surpassing conventional materials in many aspects. Although Herculean efforts have been undertaken to unravel fine functioning mechanisms of the biopolymers in question, there is still much more to be done. Here the topic of biomolecular charge transport is presented with a particular focus on charge transfer/transport in DNA and protein molecules. The experimentally revealed details, as well as the presently available theories, of charge transfer/transport along these biopolymers are critically reviewed and analyzed. A summary of the active research in this field is also given, along with a number of practical recommendations.</P> <B>Graphic Abstract</B> <P>Biomolecular charge transport is presented, with a particular focus on charge transfer/transport in DNA and protein molecules. The experimental data, as well as the presently available theories, are critically reviewed and analyzed. A summary of the active research in this field is also given, along with a number of practical recommendations. <img src='wiley_img_2010/1616301X-2010-20-12-ADFM200902066-content.gif' alt='wiley_img_2010/1616301X-2010-20-12-ADFM200902066-content'> </P>
Highly wear-resistant and biocompatible carbon nanocomposite coatings for dental implants
Penkov, O.V.,Pukha, V.E.,Starikova, S.L.,Khadem, M.,Starikov, V.V.,Maleev, M.V.,Kim, D.E. IPC Science and Technology Press 2016 Biomaterials Vol.102 No.-
<P>Diamond-like carbon coatings are increasingly used as wear-protective coatings for dental implants, artificial joints, etc. Despite their advantages, they may have several weak points such as high internal stress, poor adhesive properties or high sensitivity to ambient conditions. These weak points could be overcome in the case of a new carbon nanocomposite coating (CNC) deposited by using a C-60 ion beam on a Co/Cr alloy. The structure of the coatings was investigated by Raman and XPS spectroscopy. The wear resistance was assessed by using a reciprocating tribotester under the loads up to 0.4 N in both dry and wet sliding conditions. Biocompatibility of the dental implants was tested in vivo on rabbits. Biocompatibility, bioactivity and mechanical durability of the CNC deposited on a Co/Cr alloy were investigated and compared with those of bulk Co/Cr and Ti alloys. The wear resistance of the CNC was found to be 250-650 fold higher compared to the Co/Cr and Ti alloys. Also, the CNC demonstrated much better biological properties with respect to formation of new tissues and absence of negative morphological parameters such as necrosis and demineralization. Development of the CNC is expected to aid in significant improvement of lifetime and quality of implants for dental applications. (C) 2016 Elsevier Ltd. All rights reserved.</P>
Tanabe, Tetsumi,Noda, Koji,Miyagi, Satoshi,Kurita, Noriyuki,Tanaka, Shigenori,Setzler, Julia,Wenzel, Wolfgang,Starikov, Evgeni B.,Cuniberti, Gianaurelio Elsevier 2011 Chemical physics letters Vol.504 No.1
<P><B>Graphical abstract</B></P><P><ce:figure id='f0025'></ce:figure></P><P><B>Research highlights</B></P><P>► Electron–monocation collisions for peptides with and without disulfide bonds. ► Resonant neutral particle emissions were observed at 6–7eV. ► The presence of disulfide bonds tends to enhance the resonant bump heights.</P> <P><B>Abstract</B></P><P>Electron–ion collisions were studied for various protonated peptide monocations with disulfide bonds, using an electrostatic storage-ring equipped with a merged-electron-beam device. Resonant neutral particle emissions at the energies of 6–7eV were observed, as well as a rise towards zero-energy, which are typical electron-capture dissociation profiles. The presence of disulfide (S–S) bonds tends to enhance the resonant bump heights. Chemical nature of the amino-acid residues adjacent to cysteines appears to correlate with the bump strength. Molecular-dynamical simulations help clarify the role of molecular vibration modes in the electron-capture dissociation process.</P>