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2.068 Aktuelle Fachpublikationen zum Thema temperature

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Optical Studies of Poly(hydroxy imide) to Polybenzoxazole Thermal Rearrangement

20.11.2015 | Boz·ena Jarząbek, Magdalena Wójtowicz, Aleksandra Wolińska‐Grabczyk, Macromolecular Chemistry and Physics, 2015

Studies of the optical properties of poly(hydroxy imide) (HPI) exposed to stepwise heating from room temperature up to 400 °C are reported in this work. It is demonstrated that this new method can be used to monitor thermal rearrangement (TR) of HPI to polybenzoxazole (PBO). Temperature ...


Silicon Oxycarbide Films Produced by Remote Microwave Hydrogen Plasma CVD using a Tetramethyldisiloxane Precursor: Growth Kinetics, Structure, Surface Morphology, and Properties 

17.11.2015 | Aleksander M. Wrobel, Pawel Uznanski, Agnieszka Walkiewicz‐Pietrzykowska, Chemical Vapor Deposition, 2015

Amorphous hydrogenated silicon oxycarbide (a‐SiCO:H) thin films are produced by remote microwave hydrogen plasma CVD using 1,1,3,3‐tetramethyldisiloxane precursor. The effect of substrate temperature (TS) on the chemical structure and some properties of resulting a‐SiCO:H films is reported. The ...


Controlled Burning of Forest Detritus Altering Spectroscopic Characteristics and Chlorine Reactivity of Dissolved Organic Matter: Effects of Temperature and Oxygen Availability

17.11.2015 | Jun-Jian Wang; Randy A. Dahlgren; Alex T. Chow, Environmental Science & Technology, 2015

Forest fires occur with increasing frequency and severity in the western United States, potentially altering the chemistry and quantity of dissolved organic matter (DOM) and disinfection byproduct (DBP) precursors exported from forested watersheds. However, little is known concerning effects of ...


PECVD of Hematite Nanoblades and Nanocolumns: Synthesis, Characterization, and Growth Model 

16.11.2015 | Giorgio Carraro, Alberto Gasparotto, Chiara Maccato, Elza Bontempi, Davide Barreca, Chemical Vapor Deposition, 2015

Fe2O3 nanostructures are fabricated on Si(100) and SiO2 by plasma enhanced (PE)CVD from a FeIII β‐diketonate precursor. Depositions are carried out in Ar‐O2 plasmas, devoting particular attention to the influence of growth temperature (from 60 to 400 °C) on material chemico‐physical properties. ...


Cooperative Chemisorption-Induced Physisorption of CO2 Molecules by Metal–Organic Chains

16.11.2015 | Min Feng; Hrvoje Petek; Yongliang Shi; Hao Sun; Jin Zhao; Florencia Calaza; Martin Sterrer; Hans-Joachim Freund, ACS Nano, 2015

Effective CO2 capture and reduction can be achieved through a molecular scale understanding of interaction of CO2 molecules with chemically active sites and the cooperative effects they induce in functional materials. Self-assembled arrays of parallel chains composed of Au adatoms connected by ...


Energetics, Thermodynamics, and Molecular Recognition of Piperine with DNA

13.11.2015 | P. Haris; Varughese Mary; M. Haridas; C. Sudarsanakumar, Journal of Chemical Information and Modeling, 2015

Piperine, the bioactive phytochemical from black pepper (Piper nigrum L.), is a nontoxic natural compound exhibiting many physiological and pharmacological properties. They include antioxidant, anti-inflammatory, antimutagenic, antitumor, antiapoptotic, antigenotoxic, antiarthritic, antifungal, ...


Evidence for formation of self‐trapped excitons in a β‐Ga2O3 single crystal

12.11.2015 | Suguru Yamaoka, Masaaki Nakayama, physica status solidi (c), 2015

Abstract We have investigated photoluminescence (PL) and absorption properties of a β‐Ga2O3single crystal from the viewpoint of the stability of self‐trapped excitons (STEs). A broad PL band with a large Stokes shift, which is conventionally assigned to the STE, was observed. To reveal the ...


Thermal Adaptability of the Light-Harvesting Complex 2 from Thermochromatium tepidum: Temperature-Dependent Excitation Transfer Dynamics

12.11.2015 | Ying Shi; Ning-Jiu Zhao; Peng Wang; Li-Min Fu; Long-Jiang Yu; Jian-Ping Zhang; Zheng-Yu Wang-Otomo, Journal of Physical Chemistry B, 2015

The photosynthetic purple bacterium Thermochromatium (Tch.) tepidum is a thermophile that grows at an optimal temperature of ∼50 °C. We have investigated, by means of steady-state and time-resolved optical spectroscopies, the effects of temperature on the near-infrared light absorption and the ...


Design, Preparation, and Characterization of a Novel Red Long-Persistent Perovskite Phosphor: Ca3Ti2O7:Pr3+

11.11.2015 | Bo Wang; Hang Lin; Ju Xu; Hui Chen; Zebin Lin; Feng Huang; Yuansheng Wang, Inorganic Chemistry, 2015

Currently, the development of efficient red-emitting persistent phosphor is still an ongoing challenge. Herein, a novel red-emitting LPL phosphor Ca3Ti2O7:Pr3+ is successfully prepared by a high-temperature solid-state method. XRD Rietveld refinement analyses demonstrate the high phase purity of ...


Reversible Tuning of Interfacial and Intramolecular Charge Transfer in Individual MnPc Molecules

06.11.2015 | Jian-Qiang Zhong; Zhunzhun Wang; Jia Lin Zhang; Christopher A. Wright; Kaidi Yuan; Chengding Gu; Anton Tadich; Dongc ..., Nano Letters, 2015

The reversible selective hydrogenation and dehydrogenation of individual manganese phthalocyanine (MnPc) molecules has been investigated using photoelectron spectroscopy (PES), low-temperature scanning tunneling microscopy (LT-STM), synchrotron-based near edge X-ray absorption fine structure ...


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