Saturday, March 28, 2015

Streptavidin functionalized polymer nanodots fabricated by visible light lithography

Background: Two-photon polymerization, optionally combined with stimulated emission depletion (STED) lithography, allows two and three dimensional polymer fabrication with structure sizes and resolution below the diffraction limit. Structuring of polymers with photons, whose wavelength is within the visible range of the electromagnetic spectrum, gives new opportunities to a large field of applications e.g. in the field of biotechnology and tissue engineering. In order to create new biotechnological applications, versatile methods are needed to functionalize the polymeric structures. Results: Here we report the creation of polymer-nanodots with high streptavidin (SA) affinity via two-photon polymerization (TPP). Controlling the size of the polymer dots allows for limiting the number of the SA molecules. TPP dots with a diameter of a few 100 nm show up to 100% streptavidin loading. We can show that most of the dots are loaded by one to two streptavidins on average. Attached streptavidin molecules remain functional and are capable to bind 0.7 biotin molecules on average. Conclusion: The presented functionalized nanostructures may be used as platforms for a multitude of biological experimental setups. Nanoscopic well defined structures, capable of selective binding of streptavin proteins, used as linkers for other biotinylated biomolecules, may also find application in in-vitro sensing, like for example lab on chip devices with limited surface area.

Clemens Wolfesberger

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Friday, March 27, 2015

How Pore Parameters Affect Li Ion Depletion in Mesoporous Materials for Lithium-Ion Batteries

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The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00128




Kyung Jae Lee, Woojeong Bak, Jung-Joon Kim, Mark A. Snyder, Won Cheol Yoo and Yung-Eun Sung

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Optical Resonances of Colloidal Gold Nanorods: From Seeds to Chemically Thiolated Long Nanorods

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The Journal of Physical Chemistry C

DOI: 10.1021/jp5117273




F. J. Recio, N. Zabala, A. Rivacoba, P. Crespo, A. Ayuela, P. M. Echenique and A. Hernando

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In Situ X-ray Absorption Spectroscopy–X-ray Diffraction Investigation of Nb–H Nanoclusters in MgH2 during Hydrogen Desorption

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The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00252




C. Maurizio, R. Checchetto, A. Trapananti, A. Rizzo, F. D’Acapito and A. Miotello

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Development of Mechanically Strong Ambient Pressure Dried Silica Aerogels with Optimized Properties

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The Journal of Physical Chemistry C

DOI: 10.1021/jp5116004




Hajar Maleki, Luisa Durães and António Portugal

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An Unusual Electrochemical Reductive Cleavage of Azo Dye into Highly Redox Active Copolymeric Aniline Derivatives on a MWCNT Modified Electrode Surface at Neutral pH and Its Electroanalytical Features

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The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00612




Prakasam Gayathri, Annamalai Senthil Kumar and Sriraghavan Kamaraj

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Electrospun Nanofibrous Membranes of Polyacrylonitrile/Halloysite with Superior Water Filtration Ability

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The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00662




Maziyar Makaremi, Rangika Thilan De Silva and Pooria Pasbakhsh

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Structural and Electronic Properties of Pb- Intercalated Graphene on Ru(0001)

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The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00528




Xiangmin Fei, Lizhi Zhang, Wende Xiao, Hui Chen, Yande Que, Liwei Liu, Kai Yang, Shixuan Du and Hong-Jun Gao

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Working Together: Spatial Synchrony in the Force and Actin Dynamics of Podosome First Neighbors

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ACS Nano

DOI: 10.1021/nn506745r




Amsha Proag, Anaïs Bouissou, Thomas Mangeat, Raphaël Voituriez, Patrick Delobelle, Christophe Thibault, Christophe Vieu, Isabelle Maridonneau-Parini and Renaud Poincloux

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Hole Selective NiO Contact for Efficient Perovskite Solar Cells with Carbon Electrode

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Nano Letters

DOI: 10.1021/nl504701y




Xiaobao Xu, Zonghao Liu, Zhixiang Zuo, Meng Zhang, Zhixin Zhao, Yan Shen, Huanping Zhou, Qi Chen, Yang Yang and Mingkui Wang

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Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe2

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Nano Letters

DOI: 10.1021/nl5045007




Ignacio Gutiérrez Lezama, Ashish Arora, Alberto Ubaldini, Céline Barreteau, Enrico Giannini, Marek Potemski and Alberto F. Morpurgo

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Nanotopography Facilitates in Vivo Transdermal Delivery of High Molecular Weight Therapeutics through an Integrin-Dependent Mechanism

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Nano Letters

DOI: 10.1021/nl504829f




Laura Walsh, Jubin Ryu, Suzanne Bock, Michael Koval, Theodora Mauro, Russell Ross and Tejal Desai

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Real-Time in Situ Probing of High-Temperature Quantum Dots Solution Synthesis

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Nano Letters

DOI: 10.1021/acs.nanolett.5b00199




Benjamin Abécassis, Cécile Bouet, Cyril Garnero, Doru Constantin, Nicolas Lequeux, Sandrine Ithurria, Benoit Dubertret, Brian Richard Pauw and Diego Pontoni

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Temperature and Magnetic-Field Dependence of Radiative Decay in Colloidal Germanium Quantum Dots

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Nano Letters

DOI: 10.1021/acs.nanolett.5b00344




István Robel, Andrew Shabaev, Doh C. Lee, Richard D. Schaller, Jeffrey M. Pietryga, Scott A. Crooker, Alexander L. Efros and Victor I. Klimov

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Investigation of Line Width Narrowing and Spectral Jumps of Single Stable Defect Centers in ZnO at Cryogenic Temperature

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Nano Letters

DOI: 10.1021/nl504941q




Oliver Neitzke, Anthony Morfa, Janik Wolters, Andreas W. Schell, Günter Kewes and Oliver Benson

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Synthesis and Characterization of Copper Arsenic Sulfide Nanocrystals from Earth Abundant Elements for Solar Energy Conversion

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Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00701




Robert B. Balow, Erik J. Sheets, Mahdi M. Abu-Omar and Rakesh Agrawal

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Monothiolation and Reduction of Graphene Oxide via One-Pot Synthesis: Hybrid Catalyst for Oxygen Reduction

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ACS Nano

DOI: 10.1021/acsnano.5b00438




Chun Kiang Chua and Martin Pumera

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Nanoscale materials for hyperthermal theranostics




Nanoscale , 2015, Advance Article

DOI: 10.1039/C4NR06164K, Feature Article

Bennett E. Smith, Paden B. Roder, Xuezhe Zhou, Peter J. Pauzauskie

Recently, the use of nanoscale materials has attracted considerable attention with the aim of designing personalized therapeutic approaches that can enhance both spatial and temporal control over drug release, permeability, and uptake.

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