Thermochemical hydrogen sensor based on chalcogenide nanowire arrays

The hydrogen gas-sensing properties have been investigated of two types of thermochemical hydrogen (TCH) sensors composed of thermoelectric layers based on chalcogenide nanowire arrays and anodic aluminum oxide (AAO) templates. The monomorphic-type TCH sensor, which had only Bi 2 Te 3 nanowire arrays, showed an output signal of 23.7 μ V in response to 5 vol% hydrogen gas at room temperature, whereas an output signal of 215 μ V was obtained from an n–p junction-type TCH sensor made of connected Bi 2 Te 3 and Sb 2 Te 3 nanowire arrays in an AAO template. Despite its small deposition area, the output signal of the n–p sensor was more than nine times that of the monomorphic sensor. This observation can be explained by the difference in electrical connections (parallel and serial conversions) in the TCH sensor between each type of nanowire array. Also, our n–p sensor had a wide detection range for hydrogen gas (from ...

Seil Kim, Young-In Lee, Yo-Min Choi, Hyo-Ryoung Lim, Jae-Hong Lim, Nosang V Myung and Yong-Ho Choa

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Enzyme responsive drug delivery system based on mesoporous silica nanoparticles for tumor therapy in vivo

To reduce the toxic side effects of traditional chemotherapeutics in vivo , we designed and constructed a biocompatible, matrix metalloproteinases (MMPs) responsive drug delivery system based on mesoporous silica nanoparticles (MSNs). MMPs substrate peptide containing PLGLAR (sensitive to MMPs) was immobilized onto the surfaces of amino-functionalized MSNs via an amidation reaction, serving as MMPs sensitive intermediate linker. Bovine serum albumin was then covalently coupled to linker as end-cap for sealing the mesopores of MSNs. Lactobionic acid was further conjugated to the system as targeting motif. Doxorubicin hydrochloride was used as the model anticancer drug in this study. A series of characterizations revealed that the system was successfully constructed. The peptide-functionalized MSNs system demonstrated relatively high sensitivity to MMPs for triggering drug delivery, which was potentially important for tumor therapy since the tumor’s microenvironment overexpre...

Yun Liu, Xingwei Ding, Jinghua Li, Zhong Luo, Yan Hu, Junjie Liu, Liangliang Dai, Jun Zhou, Changjun Hou and Kaiyong Cai

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PEGylated human serum albumin (HSA) nanoparticles: preparation, characterization and quantification of the PEGylation extent

Modification with poly(ethylene glycol) (PEG) is a widely used method for the prolongation of plasma half-life of colloidal carrier systems such as nanoparticles prepared from human serum albumin (HSA). However, the quantification of the PEGylation extent is still challenging. Moreover, the influence of different PEG derivatives, which are commonly used for nanoparticle conjugation, has not been investigated so far. The objective of the present study is to develop a method for the quantification of PEG and to monitor the influence of diverse PEG reagents on the amount of PEG linked to the surface of HSA nanoparticles. A size exclusion chromatography method with refractive index detection was established which enabled the quantification of unreacted PEG in the supernatant. The achieved results were confirmed using a fluorescent PEG derivative, which was detected by photometry and fluorimetry. Additionally, PEGylated HSA nanoparticles were enzymatically digested and the linked amou...

E Fahrländer, S Schelhaas, A H Jacobs and K Langer

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Molecular Dynamic Simulations of Montmorillonite–Organic Interactions under Varying Salinity: An Insight into Enhanced Oil Recovery

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00555

Thomas Underwood, Valentina Erastova, Pablo Cubillas and H. Chris Greenwell

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Electrochemically Deposited Sb and in Doped Tin Sulfide (SnS) Photoelectrodes

The Journal of Physical Chemistry C

DOI: 10.1021/jp512927y

Mark Seal, Nirala Singh, Eric W. McFarland and Jonas Baltrusaitis

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Water Adsorption on TiOx Thin Films Grown on Au(111)

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00561

M. H. Farstad, D. Ragazzon, L. E. Walle, A. Schaefer, A. Sandell and A. Borg

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Effect of the Composition on the Nonlinear Optical Response of AuxAg1–x Nano-Alloys

The Journal of Physical Chemistry C

DOI: 10.1021/jp512404a

Irini Papagiannouli, Panagiotis Aloukos, David Rioux, Michel Meunier and Stelios Couris

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Aligned Carbon Nanotubes/Amorphous Porous Carbon Nanocomposite: A Molecular Simulation Study

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00445

Kisung Chae and Liping Huang

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Uptake of CO2 in Layered P2-Na0.67Mn0.5Fe0.5O2: Insertion of Carbonate Anions

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00097

Victor Duffort, Elahe Talaie, Robert Black and Linda F. Nazar

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Mapping the Inhomogeneous Electrochemical Reaction Through Porous LiFePO4-Electrodes in a Standard Coin Cell Battery

Chemistry of Materials

DOI: 10.1021/cm504317a

Fiona C. Strobridge, Bernardo Orvananos, Mark Croft, Hui-Chia Yu, Rosa Robert, Hao Liu, Zhong Zhong, Thomas Connolley, Michael Drakopoulos, Katsuyo Thornton and Clare P. Grey

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Reconfigurable Nanorod Films: An in Situ Study of the Relationship between the Tunable Nanorod Orientation and the Optical Properties of Their Self-Assembled Thin Films

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00503

Christian R. Ocier, Detlef-M. Smilgies, Richard D. Robinson and Tobias Hanrath

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Invar-like Behavior of Antiperovskite Mn3+xNi1–xN Compounds

Chemistry of Materials

DOI: 10.1021/cm504702m

Sihao Deng, Ying Sun, Hui Wu, Qingzhen Huang, Jun Yan, Kewen Shi, Muhammad Imran Malik, Huiqing Lu, Lei Wang, Rongjin Huang, Laifeng Li and Cong Wang

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Liquid Crystalline Poly(3-hexylthiophene) Solutions Revisited: Role of Time-Dependent Self-Assembly

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00635

Nabil Kleinhenz, Cornelia Rosu, Sourav Chatterjee, Mincheol Chang, Karthik Nayani, Zongzhe Xue, Eugenia Kim, Jamilah Middlebrooks, Paul S. Russo, Jung Ok Park, Mohan Srinivasarao and Elsa Reichmanis

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Passivation of Metal Oxide Surfaces for High-Performance Organic and Hybrid Optoelectronic Devices

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00129

Shuyi Liu, Szuheng Ho, Ying Chen and Franky So

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Direct, Soft Chemical Route to Mesoporous Metallic Lead Ruthenium Pyrochlore and Investigation of its Electrochemical Properties

Chemistry of Materials

DOI: 10.1021/cm5034904

Si Hyoung Oh, Brian D. Adams, Boeun Lee and Linda F. Nazar

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Transmission of Photonic Quantum Polarization Entanglement in a Nanoscale Hybrid Plasmonic Waveguide

Nano Letters

DOI: 10.1021/nl504636x

Ming Li, Chang-Ling Zou, Xi-Feng Ren, Xiao Xiong, Yong-Jing Cai, Guo-Ping Guo, Li-Min Tong and Guang-Can Guo

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Imaging Three-Dimensional Surface Objects with Submolecular Resolution by Atomic Force Microscopy

Nano Letters

DOI: 10.1021/nl504182w

César Moreno, Oleksandr Stetsovych, Tomoko K. Shimizu and Oscar Custance

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Co-registered Topographical, Band Excitation Nanomechanical, and Mass Spectral Imaging Using a Combined Atomic Force Microscopy/Mass Spectrometry Platform

ACS Nano

DOI: 10.1021/acsnano.5b00659

Olga S. Ovchinnikova, Tamin Tai, Vera Bocharova, Mahmut Baris Okatan, Alex Belianinov, Vilmos Kertesz, Stephen Jesse and Gary J. Van Berkel

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Organic–Clay Interfacial Chemical Bonds Probed by ab Initio Calculations

The Journal of Physical Chemistry C

DOI: 10.1021/jp510885f

Marie-Laure Bocquet, Benoit Coasne, Roland Pellenq and Franz-Joseph Ulm

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Temperature-Dependent Optical Properties of Flexible Donor–Acceptor Polymers

The Journal of Physical Chemistry C

DOI: 10.1021/jp511246n

Svante Hedström, Patrik Henriksson, Ergang Wang, Mats R. Andersson and Petter Persson

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