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Get Artificially Controllable Nanodevices Constructed by DNA PDF

By Yangyang Yang

ISBN-10: 4431557687

ISBN-13: 9784431557685

ISBN-10: 4431557695

ISBN-13: 9784431557692

In this booklet, the writer bargains usually with issues: (1) single-molecule visualization of switching behaviors within the DNA nanoframe method using other kinds of molecular switches by utilizing high-speed atomic strength microscope (AFM); (2) building of photocontrollable DNA nanostructures in programmed styles and direct visualization of the dynamic assembling approach. right here, high-speed AFM was once hired to monitor the dynamic activities of unmarried molecules. in comparison to a conventional single-molecule research procedure, equivalent to fluorescence spectroscopy or electron microscopy, high-speed AFM makes attainable the real-time remark of molecule behaviors. DNA nanostructures have been designed and assembled as scaffolds to include biomolecules. The observations have been performed lower than strong stipulations with no complex pretreatment. in addition, the photoresponsive molecules have been effectively assembled into round a hundred nm-sized DNA nanostructures. The assembly/disassembly of nanostructures will be regulated reversibly by means of photoirradiation. This publication explains how DNA origami has steadily turn into a great tool for the research of biochemical interactions in outlined nanospace. It additionally exhibits the potential for DNA nanostructures performing as nanodevices for program in organic structures, serving as a great advent to simple DNA nanotechnology.

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Additional info for Artificially Controllable Nanodevices Constructed by DNA Origami Technology: Photofunctionalization and Single-Molecule Analysis

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26 2 Direct Observation of Single Hybridization … Fig. 2 Photoirradiation of Oligonucleotides Containing Photoresponsive Domains The photoisomerization performances of the photoresponsive domains were firstly examined by using two light sources that belong to (1) Xe-lamp and (2) high-speed AFM. The UV–visible spectroscopy was carried out for both UV and visible light irradiation under different time. The single-stranded strand, Azo-4X-SS, was chosen for the characterization. Firstly, the photoirradiation was carried out by using the Xe-lamp (Asahi-spectra) (Fig.

Http://onlinelibrary. 5 Direct Observation of Association of Photoresponsive Domains in Nanoframe Under Visible Light Irradiation Under UV irradiation, the dissociation behaviors of single pair of photoresponsive domain on DNA nanoframe were directly visualized in real-time. Next it is tried to observe the reverse hybridization movements with the irradiation of visible light. The sample pretreated with UV light was loaded on the mica surface and the expected nanoframes in separated-shape were imaged.

The irradiated sample was then imaged by AFM to confirm the structural change directly, by which separated-shaped nanoframes were observed and the distribution ratio increased from 16 to 26 % (Fig. 5b). The changes demonstrated that the hybridized photoresponsive domains were dissociated by the photoirsomerization of azobenzenes from trans-form to cisform. The UV-irradiated sample was further treated with visible-light (λ = 450 nm by band path filter) for 10 min at 25 °C. The ratio of X-shaped frame recovered from 64 to 74 % (Fig.

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Artificially Controllable Nanodevices Constructed by DNA Origami Technology: Photofunctionalization and Single-Molecule Analysis by Yangyang Yang


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