Search results for "thermal [radiation mechanism]"
showing 10 items of 2571 documents
The preservation of the artistic heritage within the seat of the Chancellorship of the University of Palermo. A proposal on a methodology regarding a…
2006
The correct maintenance of artworks of historical and artistic value requires a wide and detailed analysis of all the information relevant for preserving them, such as identification of the main deterioration factors, knowledge of the climatic history of the object, set-up of measuring methods and statistics of the guide parameters, and definition of a set of recommended environmental aspects to be controlled within a stable climate condition linked to the particular kind of object or its surface. In Italy, the basic laws UNI 10829 and UNI 10969 impose a reference methodology for the in-field measurement and data analysis. This paper reports the first results of a measuring campaign, carrie…
Tetragonal tungsten bronzes Nb8−xW9+xO47−δ: optimization strategies and transport properties of a new n-type thermoelectric oxide
2015
Engineering of nanoscaled structures may help controlling the electrical and thermal transport in solids, in particular for thermoelectric applications that require the combination of low thermal conductivity and low electrical resistivity. The tetragonal tungsten bronzes Nb8−xW9+xO47 (TTB) allow a continuous variation of the charge carrier concentration while fulfilling at the same time the concept of a “phonon-glass electron-crystal” through a layered nanostructure defined by intrinsic crystallographic shear planes. The thermoelectric properties of the tetragonal tungsten bronzes Nb8−xW9+xO47−δ (0 < x < 2) were studied in the temperature range from 373 to 973 K. Structural defects and the…
Effect of nanoparticles on the morphology, mechanical properties and thermal degradation kinetics of polymetylmetacrylate and polycarbonate
2013
As the filler influences morphology, mechanical properties and thermal degradation of a polymer
2013
Increasing the Astrophysical Reach of the Advanced Virgo Detector via the Application of Squeezed Vacuum States of Light
2019
Current interferometric gravitational-wave detectors are limited by quantum noise over a wide range of their measurement bandwidth. One method to overcome the quantum limit is the injection of squeezed vacuum states of light into the interferometer's dark port. Here, we report on the successful application of this quantum technology to improve the shot noise limited sensitivity of the Advanced Virgo gravitational-wave detector. A sensitivity enhancement of up to 3.2±0.1 dB beyond the shot noise limit is achieved. This nonclassical improvement corresponds to a 5%-8% increase of the binary neutron star horizon. The squeezing injection was fully automated and over the first 5 months of the thi…
Studies of transition-edge sensor physics : thermal models and noise
2011
This thesis focuses on studying the noise in transition-edge sensors (TES). More specifically, the aim is to find an explanation for the observed excess noise that is limiting their performance and has been troubling the TES field in recent years. Several theories have been put forth but a definitive answer is still missing. In the early stages of this thesis work a novel theory was presented for the noise in a special TES geometry. In our theory the excess noise is caused by correlated fluctuations of superconductivity at the phase boundary between normal and superconducting states. Data from more recent experiments does not give solid support for the theory and in this thesis the validity…
Synthesis, Optical, and Morphological Studies of ZnO Powders and Thin Films Fabricated by Wet Chemical Methods
2020
Zinc oxide nanoparticles were prepared from Zn5(CO3)2(OH)6 precursor, capped with poly(vinylpyrrolidone) (PVP), and annealed at 600 °
Ethyl hexanoate transfer in paper and plastic food packaging by sorption and permeation experiments
2008
The barrier properties of one treated paper packaging and one standard plastic film (bi-oriented polypropylene, biOPP) were assessed for ethyl hexanoate. Three methods based either on sorption (gravimetry and micro-atmosphere-derived method) or permeation kinetic determination were used in controlled conditions of aroma vapor concentration (107 Pa), temperature (25 degrees C) and relative humidity (about 0 %). Ethyl hexanoate solubility values were on the same range of magnitude for both packaging films in spite of their different nature and composition. Ethyl hexanoate affinity for both films was well predicted by their respective solubility parameters. Solubility values were different acc…
Folate-targeted gold nanorods for effective combined photothermal-chemotherapy of osteosarcoma
2016
Osteosarcoma (OS) is the most common primary malignant neoplasm of bone. The annual incidence of osteosarcoma is 8-11 per million in the age group of 15-19 years. Despite its rarity, it has been reported to be the second leading cause of cancer-related deaths in children and young adults. In particular with regard to OS therapy, a variety of nanostructures have been exploited in the areas of OS imaging. Among them, Gold nanorods (AuNRs) have unique optical and chemical-physical properties that make them appealing for biomedical applications such as photothermal therapy, drug delivery and imaging of solid tumors. The noble metal core is biologically inert, contributing to low toxicity and go…
NIR LASER-RESPONSIVE FOLATE-TARGETED GOLD NANORODS AS EFFICIENT THERANOSTIC TOOL FOR OSTEOSARCOMA TREATMENT
2017
Folate-targeted gold nanorods (GNRs) are here proposed as selective theranostic agents for osteosarcoma treatment. Taking advantage of the attractive physiochemical and optical properties of GNRs they can be proposed as effective and selective platform to obtain a targeted intracellular drug release, photothermal therapy and cancer imaging, which may improve therapeutic outcomes of osteosarcoma. An amphiphilic polysaccharide graft-copolymer, named INU-LA-PEG-FA, and a folic acid functionalized α,β-poly(N-2-hydroxyethyl)-D,L-aspartamide (PHEA-FA), have been synthesized to act as coating agents for GNRs. The obtained polymer-coated GNRs were characterized in terms of size, shape, zeta potenti…