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      Study on Structure, Thermal Behavior, and Viscoelastic Properties of Nanodiamond-Reinforced Poly (vinyl alcohol) Nanocomposites

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          Abstract

          In this work, advanced polymer nanocomposites comprising of polyvinyl alcohol (PVA) and nanodiamonds (NDs) were developed using a single-step solution-casting method. The properties of the prepared PVA/NDs nanocomposites were investigated using Raman spectroscopy, small- and wide-angle X-ray scattering (SAXS/WAXS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). It was revealed that the tensile strength improved dramatically with increasing ND content in the PVA matrix, suggesting a strong interaction between the NDs and the PVA. SEM, TEM, and SAXS showed that NDs were present in the form of agglomerates with an average size of ~60 nm with primary particles of diameter ~5 nm. These results showed that NDs could act as a good nanofiller for PVA in terms of improving its stability and mechanical properties.

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          Mechanisms of solute release from porous hydrophilic polymers

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            The properties and applications of nanodiamonds.

            Nanodiamonds have excellent mechanical and optical properties, high surface areas and tunable surface structures. They are also non-toxic, which makes them well suited to biomedical applications. Here we review the synthesis, structure, properties, surface chemistry and phase transformations of individual nanodiamonds and clusters of nanodiamonds. In particular we discuss the rational control of the mechanical, chemical, electronic and optical properties of nanodiamonds through surface doping, interior doping and the introduction of functional groups. These little gems have a wide range of potential applications in tribology, drug delivery, bioimaging and tissue engineering, and also as protein mimics and a filler material for nanocomposites.
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              Single-shot readout of a single nuclear spin.

              Projective measurement of single electron and nuclear spins has evolved from a gedanken experiment to a problem relevant for applications in atomic-scale technologies like quantum computing. Although several approaches allow for detection of a spin of single atoms and molecules, multiple repetitions of the experiment that are usually required for achieving a detectable signal obscure the intrinsic quantum nature of the spin's behavior. We demonstrated single-shot, projective measurement of a single nuclear spin in diamond using a quantum nondemolition measurement scheme, which allows real-time observation of an individual nuclear spin's state in a room-temperature solid. Such an ideal measurement is crucial for realization of, for example, quantum error correction protocols in a quantum register.
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                Author and article information

                Contributors
                Role: Academic Editor
                Journal
                Polymers (Basel)
                Polymers (Basel)
                polymers
                Polymers
                MDPI
                2073-4360
                28 April 2021
                May 2021
                : 13
                : 9
                : 1426
                Affiliations
                [1 ]New Technologies—Research Centre, University of West Bohemia, Univerzitní 8, 306 14 Plzeň, Czech Republic; pbelsky@ 123456ntc.zcu.cz (P.B.); toko@ 123456ntc.zcu.cz (T.K.); jakadlec@ 123456ntc.zcu.cz (J.K.); minag@ 123456kmm.zcu.cz (M.G.A.); medlin@ 123456ntc.zcu.cz (R.M.); vavrunko@ 123456ntc.zcu.cz (V.V.); deshmukh@ 123456ntc.zcu.cz (K.D.)
                [2 ]Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, Qatar; kishorkumars@ 123456qu.edu.qa
                Author notes
                [* ]Correspondence: tremis@ 123456ntc.zcu.cz ; Tel.: +420-377-634-812
                Author information
                https://orcid.org/0000-0001-8825-1514
                https://orcid.org/0000-0001-8918-7809
                https://orcid.org/0000-0003-4056-4022
                https://orcid.org/0000-0001-5010-9096
                https://orcid.org/0000-0003-2730-6483
                Article
                polymers-13-01426
                10.3390/polym13091426
                8124898
                33925200
                b31f3053-30b3-472e-b6b0-8466dab3771e
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).

                History
                : 30 March 2021
                : 23 April 2021
                Categories
                Article

                poly (vinyl alcohol),nanodiamond,nanocomposite,mechanical properties,morphology

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