Self-assembled monolayer of adenine base on graphite studied by noncontact atomic force microscopy

Uchihashi, Takayuki; Okada, Takao; Sugawara, Yasuhiro; Yokoyama, Kousuke; Morita, Seizo

doi:10.1103/physrevb.60.8309

Cited by 53 publications

(42 citation statements)

References 28 publications

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“…In some cases, adsorbed molecules have been found to organize into periodic two-dimensional surface structure-structures that might have played a role in prebiotic chemical evolution. Sowerby et al (1996Sowerby et al ( , 1998aSowerby et al ( , 1998bSowerby et al ( , 2002 used scanning tunneling microscopy to document structures of self-assembled monolayers of adenine and guanine on graphite (C) and molybdenite (MoS 2 ), Kühnle et al (2002) imaged individual cysteine dimers adsorbed on gold, and Uchihashi et al (1999) observed adenine adsorption on graphite with noncontact AFM. AFM studies and molecular calculations also suggest that amino acids can adsorb selectively along linear surface steps of calcite (Orme et al 2001;de Yoreo and Dove 2004), perhaps providing an alignment conducive to homochiral polymerization .…”

Section: Molecular Organizationmentioning

confidence: 99%

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Hazen

Sverjensky²

2010

Cold Spring Harbor Perspectives in Biology

284

237

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Crystalline surfaces of common rock-forming minerals are likely to have played several important roles in life's geochemical origins. Transition metal sulfides and oxides promote a variety of organic reactions, including nitrogen reduction, hydroformylation, amination, and Fischer-Tropsch-type synthesis. Fine-grained clay minerals and hydroxides facilitate lipid self-organization and condensation polymerization reactions, notably of RNA monomers. Surfaces of common rock-forming oxides, silicates, and carbonates select and concentrate specific amino acids, sugars, and other molecular species, while potentially enhancing their thermal stabilities. Chiral surfaces of these minerals also have been shown to separate left-and right-handed molecules. Thus, mineral surfaces may have contributed centrally to the linked prebiotic problems of containment and organization by promoting the transition from a dilute prebiotic "soup" to highly ordered local domains of key biomolecules.

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Section: Molecular Organizationmentioning

confidence: 99%

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Hazen

Sverjensky²

2010

Cold Spring Harbor Perspectives in Biology

284

237

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“…Generally, the adenine molecules prefer to lie down on various substrates e.g. on SrTiO 3 (100) [26], KBr(100) [27], MoS 2 (0001) [28], and HOPG [29].…”

Section: Spectroscopic Ellipsometrymentioning

confidence: 99%

Spectroscopic ellipsometry and reflectance anisotropy spectroscopy of biomolecular layers on silicon surfaces

Zahn

Silaghi

Cobet³

et al. 2005

Physica Status Solidi (b)

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The optical properties of the DNA bases deposited on flat and vicinal, hydrogen passivated Si(111) substrates are studied using spectroscopic ellipsometry (SE) up to 9.5 eV photon energy employing synchrotron radiation and reflectance anisotropy spectroscopy (RAS). The results for the dielectric function reveal strong optical anisotropy for adenine and guanine while the other two molecules form layers with isotropic properties. The experimentally derived dielectric functions are compared to density functional theory calculations of the optical response. Particularly interesting is the RAS response of the DNA bases as a function of thickness when deposited on vicinal Si surfaces. Ordering in the layers is induced by the step and terrace structure of the vicinal Si substrates. Even though the molecular structure is not dramatically different the RAS response is very distinct and allows an unambiguous identification of the bases.

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“…A self-assembled adenine nanocrystal [47,48] was employed as a sample to verify the distance control with high accuracy. The lateral size of the nanocrystal was about 80 ¢ 80 nm 2 and the thickness was 7 nm.…”

Section: Tip-sample Distance Controlmentioning

confidence: 99%

Nano‐imaging through tip‐enhanced Raman spectroscopy: Stepping beyond the classical limits

Verma

Ichimura

Yano

et al. 2010

Laser & Photonics Reviews

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The spatial resolution in optical imaging is restricted by so-called diffraction limit, which prevents it to be better than about half of the wavelength of the probing light. Tipenhanced Raman spectroscopy (TERS), which is based on the SPP-induced plasmonic enhancement and confinement of light near a metallic nanostructure, can however, overcome this barrier and produce optical images far beyond the diffraction limit. Here in this article, the basic phenomenon involved in TERS is reviewed, and the high spatial resolution achieved in optical imaging through this technique is discussed. Further, it is shown that when TERS is combined with some other physical phenomena, the spatial resolution can be dramatically improved. Particularly, by including tip-applied extremely localized pressure in TERS process, it has been demonstrated that a spatial resolution as high as 4 nm could be achieved. nmIllustration of local deformation in an isolated carbon nanotube due to the pressure applied through the apex of a nano-tip. By sensing this local deformation by means of Raman shift in TERS, the sample can be imaged with extremely high spatial resolution.

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Self-assembled monolayer of adenine base on graphite studied by noncontact atomic force microscopy

Cited by 53 publications

References 28 publications

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Mineral Surfaces, Geochemical Complexities, and the Origins of Life

Spectroscopic ellipsometry and reflectance anisotropy spectroscopy of biomolecular layers on silicon surfaces

Nano‐imaging through tip‐enhanced Raman spectroscopy: Stepping beyond the classical limits

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