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Recently Published Articles
- Enhanced Photocatalytic Performances of CeO2/TiO2 Nanobelt Heterostructures
Jian Tian, Yuanhua Sang, Zhenhuan Zhao, Weijia Zhou, Dongzhou Wang, Xueliang Kang, Hong Liu, Jiyang Wang, Shaowei Chen, Huaqiang Cai and Hui Huang
Article first published online: 17 MAY 2013 | DOI: 10.1002/smll.201202346
The enhanced photocatalytic performance of CeO2/TiO2 heterostructured nanobelts is attributed to a novel capture–photodegradation–release degradation mechanism. During the photocatalytic process, MO molecules are captured by CeO2 nanoparticles on the surface of the heterostructure, then quickly photodegraded under UV or visible light irradiation, and ultimately the degradation products are released to external environment.
- Uptake Kinetics and Nanotoxicity of Silica Nanoparticles Are Cell Type Dependent
Julia Blechinger, Alexander T. Bauer, Adriano A. Torrano, Christian Gorzelanny, Christoph Bräuchle and Stefan W. Schneider
Article first published online: 17 MAY 2013 | DOI: 10.1002/smll.201301004
A set of experiments comparing the cytotoxicity and uptake behavior of silica nanoparticles into cells is presented. Human vascular endothelial cells (HUVEC) are more efficient in nanoparticle uptake than cervix carcinoma cells (HeLa), within the first 4 h of incubation. After 10 or 24 h, the mean number of intracellular particles for HeLa cells increases dramatically, becoming larger than the one for HUVECs. HUVECs show increased sensitivity towards silica nanoparticles when compared to HeLa cells. These results show nanotoxicity has to be assessed for each cell type individually.
- You have free access to this contentFilling Knowledge Gaps that Distinguish the Safety Profiles of Nano versus Bulk Materials (pages 1426–1427)
Yuliang Zhao, Andre Nel and Kristina Riehemann
Article first published online: 16 MAY 2013 | DOI: 10.1002/smll.201300500
- Perforated Bicontinuous Cubic Phases with pH-Responsive Topological Channel Interconnectivity
Alexandru Zabara, Renata Negrini, Ozana Onaca-Fischer and Raffaele Mezzenga
Article first published online: 16 MAY 2013 | DOI: 10.1002/smll.201300348
The presence of OmpF membrane proteins at the bilayers of a bicontinuous cubic phase provides unique topological interconnectivities among the two distinct sets of water channels, enabling molecular active gating between them. This newly designed perforated cubic phase attains transport properties well beyond those of the standard mesophase, allowing faster, sustained release of bioactive target molecules.
- Exhaustion of Racing Sperm in Nature-Mimicking Microfluidic Channels During Sorting
Savas Tasoglu, Hooman Safaee, Xiaohui Zhang, James L. Kingsley, Paolo N. Catalano, Umut Atakan Gurkan, Aida Nureddin, Emre Kayaalp, Raymond M. Anchan, Richard L. Maas, Erkan Tüzel and Utkan Demirci
Article first published online: 16 MAY 2013 | DOI: 10.1002/smll.201300020
Fertilization is central to the survival and propagation of a species, however, the precise mechanisms that regulate the sperm's journey to the egg are not well understood. In nature, the sperm has to swim through the cervical mucus, akin to a microfluidic channel. Inspired by this, a simple, cost-effective microfluidic channel is designed on the same scale. The experimental results are supported by a computational model incorporating the exhaustion time of sperm.