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DNA molecules site-specific immobilization and their applications

100%

Zhang X., Hu H.

Open Chemistry

2014

vol. 12

issue 10

977-993

In addition to its role as a carrier of genetic information, DNA has been recognized as a construction material for the assembly of different objects and structural arrangements with nanoscale features. As a result of DNA’s self-recognition properties (based on the specific base-pairing of G-C and T-A), monolayer films of nucleic acids on solid supports have attracted an escalating attentions. Recently, numerous novel materials based on two-dimensional (2D) and three-dimensional (3D) DNA structures have been reported, which extends their utility to a large number of appliations. This review paper intends to be a new and comprehensive overview of recent strategies to site-specifically immobilized DNA on various materials, including carbonaceous substances, gold, and silica substrate, emphasizing the applications of site-specific DNA nanostructure-based devices for diagnostic, bioanalytical, food safety and environmental monitoring. Additionally, an up-to-date perspective is proposed at the end of this review.

Shape-controlled synthesis of polyhedral CdS flowerlike architectures and their optical properties

61%

Kong Q., Wu H., Zhang X., Yao S., Zhang J., Zhang X.

Open Chemistry

2013

vol. 11

issue 10

1682-1688

Fabrication of polyhedral CdS flower-like architectures have been achieved on a large scale through a mixed solvothermal method. The obtained CdS are characterized by X-ray diffraction, field-emission scanning electron microscopy and transmission electron microscopy, and the results indicate that the CdS flower-like architectures with diameters of 1.5–2.0 µm are hexagonal wurtzite phase and are assembled by some pyramids with the bottom side length of about 440 nm, which have some crystallographic faces. A series of relevant experiments through altering experimental parameters, indicate that the temperature, starting materials and solvent play key roles for the shape evolution of CdS flower-like architectures. The studies of optical properties for polyhedral CdS flower-like architectures indicate that the UV-vis spectroscopy shows a blue-shift absorption peak at 500 nm compared to that of bulk CdS, the photoluminescence spectroscopy shows an emission peak at 640 nm and another strong emission peak at 695 nm, which are believed to be attributed to excitonic emission and deep levels. [...]

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2 Open Chemistry

1 2014

1 2013

2 Zhang X.

1 Hu H.

1 Kong Q.

1 Wu H.

1 Yao S.

1 Zhang J.

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DNA molecules site-specific immobilization and their applications

Shape-controlled synthesis of polyhedral CdS flowerlike architectures and their optical properties