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Cellulose Microfibril Formation by Surface-Tethered Cellulose Synthase Enzymes

28-Jan-2016 | Snehasish Basu; Okako Omadjela; David Gaddes; Srinivas Tadigadapa; Jochen Zimmer; Jeffrey M. Catchmark, ACS Nano, 2016

Cellulose microfibrils are pseudocrystalline arrays of cellulose chains that are synthesized by cellulose synthases. The enzymes are organized into large membrane-embedded complexes in which each enzyme likely synthesizes and secretes a β-(1→4) glucan. The relationship between the organization of ...

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A High‐Sensitivity and Low‐Power Theranostic Nanosystem for Cell SERS Imaging and Selectively Photothermal Therapy Using Anti‐EGFR‐Conjugated Reduced Graphene Oxide/Mesoporous Silica/AuNPs Nanosheets

27-Jan-2016 | Yu‐Wei Chen, Ting‐Yu Liu, Po‐Jung Chen, Po‐Hsueh Chang, San‐Yuan Chen, Small, 2016

A high‐sensitivity and low‐power theranostic nanosystem that combines with synergistic photothermal therapy and surface‐enhanced Raman scattering (SERS) mapping is constructed by mesoporous silica self‐assembly on the reduced graphene oxide (rGO) nanosheets with nanogap‐aligned gold ...

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Toward Biodegradable Mg–Air Bioelectric Batteries Composed of Silk Fibroin–Polypyrrole Film

27-Jan-2016 | Xiaoteng Jia, Caiyun Wang, Chen Zhao, Yu Ge, Gordon G. Wallace, Advanced Functional Materials, 2016

Biodegradable active implantable devices can be used to diagnose and/or treat disease and eventually disappear without surgical removal. If an “external” energy source is required for effective operation then a biocompatible and biodegradable battery would be ideal. In this study, a partially ...

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Quaternized Chitosan/Poly(acrylic acid) Polyelectrolyte Complex Hydrogels with Tough, Self-Recovery, and Tunable Mechanical Properties

27-Jan-2016 | Jun You; Shuyi Xie; Jinfeng Cao; Hao Ge; Min Xu; Lina Zhang; Jinping Zhou, Macromolecules, 2016

Quaternized chitosan (QCh) was homogeneously synthesized by reacting chitosan with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC) in alkali/urea aqueous solution for the first time. The structure and solution properties of QCh were characterized by using element analysis, FT-IR, 13C ...

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DFTB/PCM Applied to Ground and Excited State Potential Energy Surfaces

27-Jan-2016 | Yoshio Nishimoto, Journal of Physical Chemistry A, 2016

Accounting for solvent effects in quantum chemical calculations is vital for the accurate description of potential energy surfaces in solution. In this study, we derive a formulation of the analytical first-order geometrical derivative of ground- and excited-state energies within the ...

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Toward Understanding of Branching in RAFT Copolymerization of Methyl Methacrylate through a Cleavable Dimethacrylate

26-Jan-2016 | Shaoning Liang; Xiaohui Li; Wen-Jun Wang; Bo-Geng Li; Shiping Zhu, Macromolecules, 2016

We report the reversible addition–fragmentation chain transfer (RAFT) solution copolymerization of methyl methacrylate (MMA) with a cleavable divinyl comonomer, bis(2-methacryloyl)oxyethyl disulfide (BMAODS). 2-Cyano-2-propyldodecyl trithiocarbonate was used as a RAFT chain transfer agent and ...

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Low‐Temperature Solution Synthesis of Few‐Layer 1T ′‐MoTe2 Nanostructures Exhibiting Lattice Compression

25-Jan-2016 | Yifan Sun, Yuanxi Wang, Du Sun, Bruno R. Carvalho, Carlos G. Read, Chia‐hui Lee, Zhong Lin, Kazunori Fujisawa, Joshu ..., Angewandte Chemie International Edition, 2016

Abstract Molybdenum ditelluride, MoTe2, is emerging as an important transition‐metal dichalcogenide (TMD) material because of its favorable properties relative to other TMDs. The 1T ′ polymorph of MoTe2 is particularly interesting because it is semimetallic with bands that overlap near the ...

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Kinetics of CO2 Absorption into Aqueous Basic Amino Acid Salt: Potassium Salt of Lysine Solution

25-Jan-2016 | Shufeng Shen; Ya-nan Yang; Yangyang Bian; Yue Zhao, Environmental Science & Technology, 2016

Aqueous amino acid salts are considered as an attractive alternative to alkanolamine solvents (e.g., MEA) for carbon dioxide (CO2) absorption. The kinetics of CO2 into unloaded aqueous solutions of potassium lysinate (LysK) was studied using a wetted wall column at concentrations ranging from ...

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Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)x(NaSc)1–xSi2O6 Solid Solution

22-Jan-2016 | Zhiguo Xia; Guokui Liu; Jianguo Wen; Zhigang Mei; Mahalingam Balasubramanian; Maxim S. Molokeev; Licong Peng; Lin Gu ..., Journal of the American Chemical Society, 2016

Controlled photoluminescence tuning is important for the optimization and modification of phosphor materials. Herein we report an isostructural solid solution of (CaMg)x(NaSc)1–xSi2O6 (0 < x < 1) in which cation nanosegregation leads to the presence of two dilute Eu2+ centers. The distinct ...

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Unambiguous and Controlled One-Pot Synthesis of Multifunctional Silica Nanoparticles

21-Jan-2016 | Jeremie Ciccione; Tao Jia; Jean-Luc Coll; Karine Parra; Muriel Amblard; Said Jebors; Jean Martinez; Ahmad Mehdi; Gil ..., Chemistry of Materials, 2016

Existing strategies for the synthesis of functional silica nanoparticles (SiNPs) rely on surface modifications followed by grafting of the organic moiety via chemoselective chemistry. Under these conditions, the introduction of several elements (e.g., ligands, drugs, fluorophores, vectors, etc.) ...

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