University of Science and Technology of China

About: University of Science and Technology of China is a education organization based out in Hefei, China. It is known for research contribution in the topics: Catalysis & Graphene. The organization has 73442 authors who have published 101099 publications receiving 2412680 citations. The organization is also known as: USTC & University of Science & Technology of China.

{101}-{001} Surface Heterojunction-Enhanced Antibacterial Activity of Titanium Dioxide Nanocrystals Under Sunlight Irradiation.

Abstract: The {101}–{001} surface heterojunction constructed on polyhedral titanium dioxide (TiO2) nanocrystals has recently been proposed to be favorable for the efficient electron–hole spatial separation due to the preferential accumulation of electron and hole on {101} and {001} facets, respectively. The formed free electron and hole can promote reactive oxygen species (ROS) production, which potentially can be used for inactivation of bacteria. In the present study, a series of truncated octahedral bipyramid TiO2 nanocrystals (T1, T2, T3, and T4) coexposed with {101} and {001} facets were prepared to form various ratios of {101} to {001} facet for optimization of electron–hole spatial separation efficiency. All these polyhedral TiO2 nanocrystals could more significantly produce ROS than spherical TiO2 nanocrystals (Ts), exhibiting the higher antibacterial activity against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria under simulated sunlight irradiation. Among these polyhed...

Color sketch generation

Abstract: In this paper, we introduce an NPR system to generate color sketches in a free-hand drawing style. From observation, we found out that in a free-hand style both shape and color of image regions are stylized, which contributes cooperatively to the visual effect of a sketch. With the color regions obtained by our interactive segmentation algorithm, we create a stylized color sketch in two steps. First, in order to manifest the lighting and shading of each region, we shrink the boundary of the color regions with a luminance-based algorithm emphasizing the highlight parts, which enforces consistency with the free-hand artist style of the sketch. Second, the proposed color shift algorithm is applied to image regions to emphasize the main content of the sketch and acquires a visually pleasing combination of color. We choose the optimal combination by minimizing the energy function based on an artist drawn color database, artistic drawing rules and input image colors. The generated results show that our system can produce aesthetically pleasing sketches.

Measurement of interaction between antiprotons

Abstract: The interaction between antiprotons, produced by colliding high-energy gold ions, is shown to be attractive, and two important parameters of this interaction are measured, namely the scattering length and the effective range.

Carbon-based nanomaterials – A promising electrochemical sensor toward persistent toxic substance

Abstract: Persistent toxic substance (PTS) poses a high threat to the ecological environment and human beings because of its difficult degradation and strong toxicity. Therefore, developing a safe and simple method to detect PTS is of significance. Among many detection methods, the electrochemical method shows many advantages, including high sensitivity, low limit of detection (LOD), and low cost. Furthermore, compared with other nanomaterials, carbon-based nanomaterials are one of the excellent electrode modification materials owing to their large specific surface area and strong electron transmission performance. Therefore, the selectivity and sensitivity of the electrochemical system toward PTS could be enhanced by modifying the electrode with carbon-based nanomaterials. We comprehensively review the progress of some promising carbon-based nanomaterials in the electrochemical detection of PTS in recent years, including carbon nanotubes, graphene, and other carbon-based nanomaterials.