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Verdolotti L, Santillo C, Rollo G, Romanelli G, Lavorgna M, Liguori B, Lama GC, Preziosi E, Senesi R, Andreani C, di Prisco M. MWCNT/rGO/natural rubber latex dispersions for innovative, piezo-resistive and cement-based composite sensors. Sci Rep 2021; 11:18975. [PMID: 34556805 PMCID: PMC8460753 DOI: 10.1038/s41598-021-98596-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 08/27/2021] [Indexed: 02/08/2023] Open
Abstract
The present study is focused on the development and characterization of innovative cementitious-based composite sensors. In particular, multifunctional cement mortars with enhanced piezoresistive properties are realized by exploiting the concept of confinement of Multiwall Carbon Nanotubes (MWCNTs) and reduced Graphene Oxide (rGO) in a three-dimensional percolated network through the use of a natural-rubber latex aqueous dispersion. The manufactured cement-based composites were characterized by means of Inelastic Neutron Scattering to assess the hydration reactions and the interactions between natural rubber and the hydrated-cement phases and by Scanning Electron Microscopy and X-Ray diffraction to evaluate the morphological and mineralogical structure, respectively. Piezo-resistive properties to assess electro-mechanical behavior in strain condition are also measured. The results show that the presence of natural rubber latex allows to obtain a three-dimensional rGO/MWCNTs segregate structure which catalyzes the formation of hydrated phases of the cement and increases the piezo-resistive sensitivity of mortar composites, representing a reliable approach in developing innovative mortar-based piezoresistive strain sensors.
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Affiliation(s)
- L. Verdolotti
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy ,grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, Via Previati 1/C, 23900 Lecco, Milan, Italy
| | - C. Santillo
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy
| | - G. Rollo
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy
| | - G. Romanelli
- grid.14467.30Rutherford Appleton Laboratory, ISIS Facility, Chilton, Didcot, Oxfordshire, OX11OQX UK
| | - M. Lavorgna
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy ,grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, Via Previati 1/C, 23900 Lecco, Milan, Italy
| | - B. Liguori
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy ,grid.4691.a0000 0001 0790 385XDepartment of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio, 1, 80138 Naples, Italy
| | - G. C. Lama
- grid.5326.20000 0001 1940 4177Institute of Polymers, Composite and Biomaterials, National Research Council, , P.Le Enrico Fermi, 1, 80055 Portici, Naples, Italy
| | - E. Preziosi
- grid.6530.00000 0001 2300 0941Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - R. Senesi
- grid.6530.00000 0001 2300 0941Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - C. Andreani
- grid.6530.00000 0001 2300 0941Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - M. di Prisco
- grid.4643.50000 0004 1937 0327Department of Civil and Environmental Engineering, Politecnico di Milano, P.za Leonardo da Vinci, 32, 20133 Milan, Italy
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Festa G, Andreani C, Baldoni M, Cipollari V, Martínez-Labarga C, Martini F, Rickards O, Rolfo MF, Sarti L, Volante N, Senesi R, Stasolla FR, Parker SF, Vassalo AR, Mamede AP, Batista de Carvalho LAE, Marques MPM. First analysis of ancient burned human skeletal remains probed by neutron and optical vibrational spectroscopy. Sci Adv 2019; 5:eaaw1292. [PMID: 31259242 PMCID: PMC6598762 DOI: 10.1126/sciadv.aaw1292] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 05/17/2019] [Indexed: 05/23/2023]
Abstract
Burned skeletal remains are abundant in archaeological and paleontological sites, the result of fire or of ancient funerary practices. In the burning process, the bone matrix suffers structural and dimensional changes that interfere with the reliability of available osteometric methods. Recent studies showed that these macroscopic changes are accompanied by microscopic variations are reflected in vibrational spectra. An innovative integrated approach to the study of archaeological combusted skeletal remains is reported here, where the application of complementary vibrational spectroscopic techniques-INS (inelastic neutron scattering), FTIR (Fourier transform infrared), and micro-Raman-enables access to the complete vibrational profile and constitutes the first application of neutron spectroscopy to ancient bones. Comparison with data from modern human bones that were subjected to controlled burning allowed identification of specific heating conditions. This pioneering study provides archaeologists and anthropologists with relevant information on past civilizations, including regarding funerary, burial, and cooking practices and environmental settings.
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Affiliation(s)
- G. Festa
- CENTRO FERMI–Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Piazza del Viminale 1, 00184 Rome, Italy
| | - C. Andreani
- CENTRO FERMI–Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Piazza del Viminale 1, 00184 Rome, Italy
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Fisica, Via della Ricerca Scientifica 1, 00133 Rome, Italy
- Università degli Studi di Roma “Tor Vergata”–Centro NAST, Via della Ricerca Scientifica 1, 00133 Rome Italy
| | - M. Baldoni
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Biologia, Via della Ricerca Scientifica 1, 00133 Rome, Italy
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Biomedicina e Prevenzione, Via Montpellier 1, 00133 Rome, Italy
| | - V. Cipollari
- Soprintendenza Archeologica, Belle Arti e Paesaggio per l’area metropolitana di Roma, la provincia di Viterbo e l’Etruria meridionale, Via Cavalletti 2, 00186 Rome, Italy
| | - C. Martínez-Labarga
- Università degli Studi di Roma “Tor Vergata”–Centro NAST, Via della Ricerca Scientifica 1, 00133 Rome Italy
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Biologia, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - F. Martini
- Università degli Studi di Firenze–Dipartimento di Storia, Archeologia, Geografia, Arte e Spettacolo, Via S. Gallo 10, 50129 Florence, Italy
| | - O. Rickards
- Università degli Studi di Roma “Tor Vergata”–Centro NAST, Via della Ricerca Scientifica 1, 00133 Rome Italy
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Biologia, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - M. F. Rolfo
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Storia, Patrimonio culturale, Formazione e Società, Via Columbia 1, 00133 Rome, Italy
| | - L. Sarti
- Università di Siena–Dipartimento di Scienze Storiche dei Beni Culturali, Via Val di Montone 4–Via Roma 56, 53100 Siena, Italy
| | - N. Volante
- Università di Siena–Dipartimento di Scienze Storiche dei Beni Culturali, Via Val di Montone 4–Via Roma 56, 53100 Siena, Italy
| | - R. Senesi
- CENTRO FERMI–Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Piazza del Viminale 1, 00184 Rome, Italy
- Università degli Studi di Roma “Tor Vergata”–Dipartimento di Fisica, Via della Ricerca Scientifica 1, 00133 Rome, Italy
- Università degli Studi di Roma “Tor Vergata”–Centro NAST, Via della Ricerca Scientifica 1, 00133 Rome Italy
| | - F. R. Stasolla
- Sapienza Università di Roma–Dipartimento di Scienze dell’Antichità, Piazzale A. Moro 5, 00185 Rome, Italy
| | - S. F. Parker
- ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK
| | - A. R. Vassalo
- University of Coimbra–Unidade de I&D “Química-Física Molecular”, Department of Chemistry, Coimbra 3004-535, Portugal
| | - A. P. Mamede
- University of Coimbra–Unidade de I&D “Química-Física Molecular”, Department of Chemistry, Coimbra 3004-535, Portugal
| | - L. A. E. Batista de Carvalho
- University of Coimbra–Unidade de I&D “Química-Física Molecular”, Department of Chemistry, Coimbra 3004-535, Portugal
| | - M. P. M. Marques
- University of Coimbra–Unidade de I&D “Química-Física Molecular”, Department of Chemistry, Coimbra 3004-535, Portugal
- University of Coimbra–Department of Life Sciences, Coimbra 3000-456, Portugal
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Festa G, Christiansen T, Turina V, Borla M, Kelleher J, Arcidiacono L, Cartechini L, Ponterio RC, Scatigno C, Senesi R, Andreani C. Egyptian metallic inks on textiles from the 15 th century BCE unravelled by non-invasive techniques and chemometric analysis. Sci Rep 2019; 9:7310. [PMID: 31086242 PMCID: PMC6513853 DOI: 10.1038/s41598-019-43655-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 04/29/2019] [Indexed: 11/24/2022] Open
Abstract
The development of black inks has enabled writing to become an established method of communication in history. Although a large research effort has been devoted to the study of pigments and dyes used in ancient Egypt to decorate burial walls and furnishings, or to write on papyrus, to date little attention has been paid to the nature and technology of inks used on ritual and daily-use textiles, which may have fostered the transfer of metallic ink technology onto papyrus and parchment supports. We report about inks from 15th century BCE Egyptian textiles by combining non-invasive techniques, including ultraviolet (UV) reflected imaging, near-infrared reflectography (NIRR), X-ray fluorescence (XRF) spectroscopy, Raman spectroscopy and prompt-gamma-activation-analysis (PGAA). It is argued that the inks are related to the family of iron gall inks, whose introduction is commonly attributed to the third century BCE. This interpretation frames the technology of writing on fabrics, used by the ancient Egyptians, in a different time, thus providing new information on the genesis of mordant inks in the ancient Mediterranean cultures. We anticipate our study to be a starting point for further and more sophisticated investigations of textiles, which will clarify the origin of metallic ink in the ancient world.
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Affiliation(s)
- G Festa
- CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Rome, Italy
| | - T Christiansen
- Museo Egizio di Torino, Via Accademia delle Scienze 6, 10123, Turin, Italy
| | - V Turina
- Museo Egizio di Torino, Via Accademia delle Scienze 6, 10123, Turin, Italy
| | - M Borla
- Supreme Council for Archeology of Piedmont, P.zza S. Giovanni 2, 10122, Torino, Italy
| | - J Kelleher
- STFC, Rutherford Appleton Laboratory - ISIS neutron and muon Facility, Didcot, OX11 0QX, United Kingdom.
| | - L Arcidiacono
- CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Rome, Italy.,University College London, Institute of Archaeology, 31-34 Gordon Square, Kings Cross, London, WC1H 0PY, United Kingdom
| | - L Cartechini
- CNR- Istituto di Scienze e Tecnologie Molecolari (ISTM), Via Elce di sotto 8, 06123, Perugia, Italy
| | - R C Ponterio
- CNR - Istituto per i Processi Chimico-Fisici (IPCF), Viale Ferdinando Stagno d'Alcontres 37, Messina, Italy
| | - C Scatigno
- Università degli Studi di Roma Tor Vergata, Dipartimento di Fisica and NAST Centre, Via della Ricerca Scientifica 1, 00133, Rome, Italy.,Università degli Studi di Roma Tor Vergata, Dipartimento di Scienze e Tecnologie Chimiche, Via della Ricerca Scientifica 1, 00133, Rome, Italy
| | - R Senesi
- CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Rome, Italy. .,CNR - Istituto per i Processi Chimico-Fisici (IPCF), Viale Ferdinando Stagno d'Alcontres 37, Messina, Italy. .,Università degli Studi di Roma Tor Vergata, Dipartimento di Fisica and NAST Centre, Via della Ricerca Scientifica 1, 00133, Rome, Italy.
| | - C Andreani
- CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Piazza del Viminale 1, 00184, Rome, Italy.,CNR - Istituto per i Processi Chimico-Fisici (IPCF), Viale Ferdinando Stagno d'Alcontres 37, Messina, Italy.,Università degli Studi di Roma Tor Vergata, Dipartimento di Fisica and NAST Centre, Via della Ricerca Scientifica 1, 00133, Rome, Italy
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Schooneveld EM, Pietropaolo A, Andreani C, Perelli Cippo E, Rhodes NJ, Senesi R, Tardocchi M, Gorini G. Radiative neutron capture as a counting technique at pulsed spallation neutron sources: a review of current progress. Rep Prog Phys 2016; 79:094301. [PMID: 27502571 DOI: 10.1088/0034-4885/79/9/094301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Neutron scattering techniques are attracting an increasing interest from scientists in various research fields, ranging from physics and chemistry to biology and archaeometry. The success of these neutron scattering applications is stimulated by the development of higher performance instrumentation. The development of new techniques and concepts, including radiative capture based neutron detection, is therefore a key issue to be addressed. Radiative capture based neutron detectors utilize the emission of prompt gamma rays after neutron absorption in a suitable isotope and the detection of those gammas by a photon counter. They can be used as simple counters in the thermal region and (simultaneously) as energy selector and counters for neutrons in the eV energy region. Several years of extensive development have made eV neutron spectrometers operating in the so-called resonance detector spectrometer (RDS) configuration outperform their conventional counterparts. In fact, the VESUVIO spectrometer, a flagship instrument at ISIS serving a continuous user programme for eV inelastic neutron spectroscopy measurements, is operating in the RDS configuration since 2007. In this review, we discuss the physical mechanism underlying the RDS configuration and the development of associated instrumentation. A few successful neutron scattering experiments that utilize the radiative capture counting techniques will be presented together with the potential of this technique for thermal neutron diffraction measurements. We also outline possible improvements and future perspectives for radiative capture based neutron detectors in neutron scattering application at pulsed neutron sources.
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Affiliation(s)
- E M Schooneveld
- Science and Technology Facilities Council, Didcot, Oxfordshire, UK
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Abstract
The single-particle dynamics of hydrogen atoms in several of the amorphous ices are reported using a combination of deep inelastic neutron scattering (DINS) and inelastic neutron scattering (INS). The mean kinetic energies of the hydrogen nuclei are found to increase with increasing density, indicating the weakening of hydrogen bonds as well as a trend toward steeper and more harmonic hydrogen vibrational potential energy surfaces. DINS shows much more pronounced changes in the O-H stretching component of the mean kinetic energy going from low- to high-density amorphous ices than indicated by INS and Raman spectroscopy. This highlights the power of the DINS technique to retrieve accurate ground-state kinetic energies beyond the harmonic approximation. In a novel approach, we use information from DINS and INS to determine the anharmonicity constants of the O-H stretching modes. Furthermore, our experimental kinetic energies will serve as important benchmark values for path-integral Monte Carlo simulations.
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Affiliation(s)
- A Parmentier
- †Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - J J Shephard
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- §Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - G Romanelli
- †Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - R Senesi
- †Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
- ∥CNR-IPCF Sezione di Messina, Viale F. Stagno D'Alcontres 37, 98158 Messina, Italy
| | - C G Salzmann
- ‡Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - C Andreani
- †Dipartimento di Fisica and NAST Centre, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
- ∥CNR-IPCF Sezione di Messina, Viale F. Stagno D'Alcontres 37, 98158 Messina, Italy
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Senesi R, Romanelli G, Adams M, Andreani C. Temperature dependence of the zero point kinetic energy in ice and water above room temperature. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.09.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Andreani C, Romanelli G, Senesi R. A combined INS and DINS study of proton quantum dynamics of ice and water across the triple point and in the supercritical phase. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.07.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bobone S, Gerelli Y, De Zotti M, Bocchinfuso G, Farrotti A, Orioni B, Sebastiani F, Latter E, Penfold J, Senesi R, Formaggio F, Palleschi A, Toniolo C, Fragneto G, Stella L. Membrane thickness and the mechanism of action of the short peptaibol trichogin GA IV. Biochim Biophys Acta 2012; 1828:1013-24. [PMID: 23220179 DOI: 10.1016/j.bbamem.2012.11.033] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/20/2012] [Accepted: 11/27/2012] [Indexed: 12/21/2022]
Abstract
Trichogin GA IV (GAIV) is an antimicrobial peptide of the peptaibol family, like the extensively studied alamethicin (Alm). GAIV acts by perturbing membrane permeability. Previous data have shown that pore formation is related to GAIV aggregation and insertion in the hydrophobic core of the membrane. This behavior is similar to that of Alm and in agreement with a barrel-stave mechanism, in which transmembrane oriented peptides aggregate to form a channel. However, while the 19-amino acid long Alm has a length comparable to the membrane thickness, GAIV comprises only 10 amino acids, and its helix is about half the normal bilayer thickness. Here, we report the results of neutron reflectivity measurements, showing that GAIV inserts in the hydrophobic region of the membrane, causing a significant thinning of the bilayer. Molecular dynamics simulations of GAIV/membrane systems were also performed. For these studies we developed a novel approach for constructing the initial configuration, by embedding the short peptide in the hydrophobic core of the bilayer. These calculations indicated that in the transmembrane orientation GAIV interacts strongly with the polar phospholipid headgroups, drawing them towards its N- and C-termini, inducing membrane thinning and becoming able to span the bilayer. Finally, vesicle leakage experiments demonstrated that GAIV activity is significantly higher with thinner membranes, becoming similar to that of Alm when the bilayer thickness is comparable to its size. Overall, these data indicate that a barrel-stave mechanism of pore formation might be possible for GAIV and for similarly short peptaibols despite their relatively small size.
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Affiliation(s)
- S Bobone
- Department of Chemical Sciences and Technologies, University of Rome, Rome, Italy
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Flammini D, Pietropaolo A, Senesi R, Andreani C, McBride F, Hodgson A, Adams MA, Lin L, Car R. Spherical momentum distribution of the protons in hexagonal ice from modeling of inelastic neutron scattering data. J Chem Phys 2012; 136:024504. [DOI: 10.1063/1.3675838] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Reiter GF, Senesi R, Mayers J. Changes in the zero-point energy of the protons as the source of the binding energy of water to A-phase DNA. Phys Rev Lett 2010; 105:148101. [PMID: 21230870 DOI: 10.1103/physrevlett.105.148101] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Indexed: 05/30/2023]
Abstract
The measured changes in the zero-point kinetic energy of the protons are entirely responsible for the binding energy of water molecules to A phase DNA at the concentration of 6 water molecules/base pair. The changes in kinetic energy can be expected to be a significant contribution to the energy balance in intracellular biological processes and the properties of nano-confined water. The shape of the momentum distribution in the dehydrated A phase is consistent with coherent delocalization of some of the protons in a double well potential, with a separation of the wells of 0.2 Å.
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Affiliation(s)
- G F Reiter
- Physics Department, University of Houston, Houston, Texas 77204, USA
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Pantalei C, Pietropaolo A, Senesi R, Imberti S, Andreani C, Mayers J, Burnham C, Reiter G. Proton momentum distribution of liquid water from room temperature to the supercritical phase. Phys Rev Lett 2008; 100:177801. [PMID: 18518339 DOI: 10.1103/physrevlett.100.177801] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Indexed: 05/26/2023]
Abstract
Measurements of the proton momentum distribution n(p) in water from ambient conditions to above the supercritical point are compared with theoretical calculations based on a recently developed polarizable water model. The n(p) along the H-bond direction is narrower in the dense phases, and approaches that of the isolated molecule in the more dilute phases. The theoretical model, which includes only electrostatic interactions, is unable to explain the softening of the local potential experienced by the proton in the dense phases, but it accurately predicts the n(p) for the dilute phases.
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Affiliation(s)
- C Pantalei
- Università degli Studi di Roma "Tor Vergata," Dipartimento di Fisica and Centro NAST (Nanoscienze-Nanotecnologie-Strumentazione), Via della Ricerca Scientifica 1, 00133 Roma, Italy
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Pietropaolo A, Senesi R, Andreani C, Botti A, Ricci MA, Bruni F. Excess of proton mean kinetic energy in supercooled water. Phys Rev Lett 2008; 100:127802. [PMID: 18517911 DOI: 10.1103/physrevlett.100.127802] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2007] [Indexed: 05/26/2023]
Abstract
We find, by means of a deep inelastic neutron scattering experiment, a significant excess of proton mean kinetic energy E_(k) in supercooled water, compared with that measured in stable liquid and solid phases. The measured values of E_(k) at moderate degrees of supercooling do not fit the predicted linear increase with temperature observed for the water stable phases. This anomalous behavior is confirmed by the shape of the measured momentum distribution, thus supporting a likely occurrence of ground-state quantum delocalization of a proton between the O atoms of two neighboring molecules. These results strongly suggest a transition from a single-well to a double-well potential felt by the delocalized proton, with a reduced first neighbor O-O distance, in the supercooled state, as compared to ambient condition.
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Affiliation(s)
- A Pietropaolo
- Dipartimento di Fisica and Centro, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
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Garbuio V, Andreani C, Imberti S, Pietropaolo A, Reiter GF, Senesi R, Ricci MA. Proton quantum coherence observed in water confined in silica nanopores. J Chem Phys 2007; 127:154501. [DOI: 10.1063/1.2789436] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Senesi R, Pietropaolo A, Bocedi A, Pagnotta SE, Bruni F. Proton momentum distribution in a protein hydration shell. Phys Rev Lett 2007; 98:138102. [PMID: 17501242 DOI: 10.1103/physrevlett.98.138102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Indexed: 05/15/2023]
Abstract
The momentum distribution of protons in the hydration shell of a globular protein has been measured through deep inelastic neutron scattering at 180 and 290 K, below and above the crossover temperature Tc=1.23Tg, where Tg=219 K is the glass transition temperature. It is found that the mean kinetic energy of the water hydrogens shows no temperature dependence, but the measurements are accurate enough to indicate a sensible change of momentum distribution and effective potential felt by protons, compatible with the transition from a single to a double potential well. This could support the presence of tunneling effects even at room temperature, playing an important role in biological function.
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Affiliation(s)
- R Senesi
- Dipartimento di Fisica and Centro NAST, Università degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
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Tardocchi M, Gorini G, Perelli-Cippo E, Andreani C, Imberti S, Pietropaolo A, Senesi R, Rhodes NR, Schooneveld EM. VLAD for epithermal neutron scattering experiments at large energy transfers. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/1742-6596/41/1/050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Filabozzi A, Andreani C, De Pascale MP, Gorini G, Pietropaolo A, Perelli Cippo E, Senesi R, Tardocchi M, Kockelmann W. Texture and structure studies on marbles from Villa Adriana via neutron diffraction technique. Journal of Neutron Research 2006. [DOI: 10.1080/10238160600673128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tardocchi M, Andreani C, Cremonesi O, Gorini G, Perelli-Cippo E, Pietropaolo A, Rhodes N, Schooneveld E, Senesi R. Development of the Very Low Angle Detector (VLAD) for detection of epithermal neutrons at low momentum transfers. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.nuclphysbps.2005.02.112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Cunsolo A, Colognesi D, Sampoli M, Senesi R, Verbeni R. Signatures of quantum behavior in the microscopic dynamics of liquid hydrogen and deuterium. J Chem Phys 2005; 123:114509. [PMID: 16392575 DOI: 10.1063/1.2033807] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We discuss the microscopic dynamics and structure of liquid hydrogen and deuterium, as probed by inelastic x-ray scattering measurements. Samples are kept in corresponding thermodynamic conditions, at which classical systems are expected to exhibit the same dynamic and static responses. On the contrary, we observe clear differences revealing the onset of quantum deviations, both in the broadening of inelastic excitations and in the position of the first sharp diffraction peak. These features are discussed, compared to path-integral Monte Carlo simulations, and finally associated with the different de Broglie wavelengths of the two isotopes.
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Affiliation(s)
- A Cunsolo
- INFM-Operative Group in Grenoble, France.
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Botti A, Bruni F, Isopo A, Modesti G, Oliva C, Ricci MA, Senesi R, Soper AK. Water structure in supercritical mixtures of water and rare gases. J Chem Phys 2003. [DOI: 10.1063/1.1523916] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Senesi R, Andreani C, Colognesi D, Cunsolo A, Nardone M. Deep-inelastic neutron scattering determination of the single-particle kinetic energy in solid and liquid 3He. Phys Rev Lett 2001; 86:4584-4587. [PMID: 11384289 DOI: 10.1103/physrevlett.86.4584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2000] [Indexed: 05/23/2023]
Abstract
An experimental determination of the single-particle mean kinetic energies for 3He along the T = 2.00 K isotherm in the dense liquid and in the solid hcp and bcc phases is reported. Deep-inelastic neutron scattering measurements at exchanged wave vectors ranging from 90.0 to 140.0 A(-1) have been performed in order to evaluate, within the framework of the impulse approximation, the molar volume dependence of the kinetic energy. The results are found in excellent agreement with recent diffusion Monte Carlo simulations.
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Affiliation(s)
- R Senesi
- Istituto Nazionale per la Fisica della Materia, UdR Roma Tor Vergata, via della Ricerca Scientifica 1, 00133 Roma, Italy
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Andreani C, Degiorgi E, Senesi R, Cilloco F, Colognesi D, Mayers J, Nardone M, Pace E. Single particle dynamics in fluid and solid hydrogen sulphide: An inelastic neutron scattering study. J Chem Phys 2001. [DOI: 10.1063/1.1329139] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Casalboni M, De Matteis F, Ferone V, Prosposito P, Senesi R, Pizzoferrato R, Bianco A, De Mico A. DODCI molecules incorporated in sol–gel glasses: the interaction with the silica matrix. Chem Phys Lett 1998. [DOI: 10.1016/s0009-2614(98)00548-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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