Special Issue "Synchrotron Radiation Techniques for the Investigation of Nanomaterials"
A special issue of Nanomaterials (ISSN 2079-4991).
Deadline for manuscript submissions: 30 September 2020.
Interests: solid state chemistry, diffraction, pair distribution function, photons & neutrons, disorder, thermodynamics of defects, strongly correlated systems, ionic conductor
Interests: synchrotron radiation, material chemistry, powder diffraction, pair distribution function, phase transformations, intermetallics, catalysis, disorder, ionic conductors
Exploring nano-worlds requires one to keep pushing the limits of technologies forward. In this context, new approaches, techniques, and strategies have been developed in recent years involving the use of synchrotron sources, taking advantage of the extreme versatility of synchrotron radiation.
This Special Issue of Nanomaterials is dedicated to the role of synchrotron radiation probes in the investigation of nanomaterials, starting from a computing approach to simulate and develop experiments, passing through new techniques, devices, and environments developed to study nanomaterials, and ending in scientific results on the structure and properties of nano-materials, -particles, -composites, and -domains.
It is dedicated to the memory of Dr. Claudio Ferrero (ESRF), former head of the data analysis unit of the European Synchrotron ESRF, who spent most of his nights and weekends dedicated to his true mission: performing experiments at all the beamlines of the ESRF.
Dr. Marco Scavini
Dr. Mauro Coduri
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Synchrotron radiation
- Biological nanostructures
- Polymeric nanostructures
- Thin films
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Nanostructure of unconventional liquid crystals investigated by synchrotron radiation
Authors: Vita, F.C. Adamo, M. Pisani and O. Francescangeli *
Affiliation: Dipartimento di Scienze e Ingegneria della Materia, dell’Ambiente ed UrbanisticaUniversità Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
* Corresponding author: [email protected]
Absract: Among the variety of soft materials currently investigated for their promising technological applications, liquid crystals (LCs) play a prominent role because of the wealth of supramolecular structures that they exhibit and their potential to reflect specific nanostructural features into unconventional macroscopic properties. In this paper we review a number of recent experimental studies performed with synchrotron radiation to investigate the nanoscale structure of new unconventional LCs and LC-based soft materials of high fundamental and technological impact. These include bent-core (or banana-shaped) mesogens, all-aromatic mesogens, high performance thermosets and polymer dispersed LCs. In all cases, synchrotron radiation combined with ad-hoc experimental setup has made it possible to investigate the details of the inherent LC (orientational and positional) order featuring the mesophases and responsible for these peculiar properties. The unconventional properties of the investigated materials were found to result from the inherent peculiar orientational and/or positional order of the nematic mesophases specifically involved.
Title: The Terahertz Dynamics of an Aqueous Nanoparticle Suspension: An Inelastic X-ray Scattering Study
Authors: Alessio De Francesco,1 Luisa Scaccia,2 Ferdinando Formisano,1 Marco Maccarini,3 Ahmet Alatas,4 and Alessandro Cunsolo5
1 Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali c/o OGG and Institut Laue Langevin, 71 avenue des Martyrs, 38042 Grenoble, France.
2 Dipartimento di Economia e Diritto, Università di Macerata, Via Crescimbeni 20, 62100 Macerata, Italy.
3 Université Grenoble-Alpes - Laboratoire TIMC/IMAG (UMR CNRS 5525), Pavillon Taillefer, Domaine de la Merci, 38700 La Tronche, France.
4 Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
5 National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA.
Abstract: We used the high-resolution Inelastic X-ray Scattering beamline of the Advanced Photon Source at Argonne National Laboratory to jointly measure the terahertz spectrum of pure water and a dilute aqueous suspension of 15 nm diameter Au nanoparticles (NPs). We observe that, despite their sparse volume concentration of about .5%, the immersed NPs strongly influence collective molecular dynamics of the hosting liquid. We investigate this effect through a Bayesian inference analysis of the spectral lineshape, which ultimately elucidates how terahertz transport properties of water change upon NP immersion.
Title: The structure and chemical composition of the pyrolytic coatings of Cr and Fe on the surface of MWCNTs according to NEXAFS and XPS spectroscopy
Abstract: The paper is devoted to the structure and properties of the composite material based on multi-walled carbon nanotubes (MWCNT) covered with pyrolytic Fe and Cr. Composites (pyrolytic Fe)/MWCNTs and (pyrolytic Cr)/MWCNTs have been prepared by the metal organic chemical vapor deposition (MOCVD) growth technique using iron pentacarbonyl and bis(arene)chromium compounds, respectively. Preliminary composites structures and morphologies were studied using X-ray diffraction and scanning electron microscopy. The atomic and chemical composition of MWCNTs surface, Fe-coating and Cr-coating and interface – (MWCNTs surface)/(metal coating) were studied by total electron yield method in the region of NEXAFS C1s-, Fe2p- and Cr2p-absorption edges with using synchrotron radiation of Russian-German dipole beamline (RGBL) at BESSY-II. The study has shown that MWCNTs top layers in composite have no significant destruction; the MWCNTs metal coatings are continuous and consist of Fe3O4 and Cr2O3. It is shown that the interface between MWCNT and pyrolytic Fe and Cr coatings has a multilayer structure: a layer in which carbon atoms along with epoxy -C – O – C- bonds form bonds with oxygen and metal atoms from the coating layer is formed on the outer surface of the MWCNT, a monolayer of metal carbide above it and an oxide layer on top. The iron oxide and chromium oxide adhesion is provided by single, double and epoxy chemical binding formation between carbon atoms of the MWCNTs top layer and the oxygen atoms of the coating, as well as the formation of bonds with metal atoms.
Keywords: NEXAFS, XPS, MOCVD, total electron yield, multi-walled carbon nanotube, nanocomposite (pyrolitic Cr)/MWCNTs, (pyrolitic Fe)/MWCNTs.
Title: Synchrotron based characterization of hexagonal and cubic phases loaded with Gold(I) phosphane compounds as anticancer drug delivery systems
Authors: Paola Astolfi1, Michela Pisani1*, Elisabetta Giorgini2, Barbara Rossi3, Alessandro Damin4, Francesco Vita1, Oriano Francescangeli1, Lorenzo Luciani,5 Rossana Galassi5
1 Dipartimento SIMAU, Università Politecnica delle Marche, Via Brecce Bianche, Ancona, I-60131.
2 Dipartimeto DiSVA, Università Politecnica delle Marche, Via Brecce Bianche, Ancona, I-60131.
3 Elettra - Sincrotrone Trieste S.C.p.A., S.S. 14 - km 163.5, Basovizza, Trieste, I-34149.
4 Department of Chemistry, NIS Centre and INSTM Reference Centre University of Turin, Via G. Quarello 15, I-10135Turin, Italy
5 Scuola di Scienze e Tecnologie, Divisione Chimica, Università di Camerino, Via Sant’Agostino, I-62032.
Abstract: Recently, a renewed interest has been addressed to gold(I) phosphane compounds as new protagonists in cancer therapy. A class of phosphane gold(I) complexes containing azolate ligands has been successfully tested against several cancer lines. Even though the anticancer activity of gold(I) phosphane compounds is thoroughly ascertained, no studies have been devoted to the possibility of their delivery in nanovectors. Herein, nonlamellar lyotropic liquid crystalline lipid nanosystems, a promising class of smart materials, have been used to encapsulate Gold(I) azolate/phosphane complexes. In particular, ((triphenylphosphine)-gold(I)-(4,5-dichloroimidazolyl-1H-1yl)) (C-I) and ((triphenylphosphine)-gold(I)-(4,5-dicyanoimidazolyl-1H-1yl)) (C-II) have been encapsulated in different lipid matrix such as phytantriol, DOPE and monoolein (GMO). An integrated experimental approach involving X-ray diffraction and UV Resonant Raman spectroscopy based on synchrotron light and ATR-FTIR spectroscopy has been employed to establish the effects of drug encapsulation on the structure and phase behavior of the mesophases. Gold(I) complexes C-I and C-II are successfully encapsulated in the three lipid matrices and, especially, the UVRR spectra show spectral changes occurring upon loading, mainly involving the phosphane moiety of the complexes. Compound C-I encapsulation results in a greater effect on the phase behavior of GMO and Phytantriol compared to C-II.
Title: Structural study of-nano sized gahnite (ZnAl2O4): from the average to the local scale
Authors: Giorgia Confalonieri1*, Nicola Rotiroti1, Andrea Bernasconi1**, Monica Dapiaggi1
1 Università degli Studi di Milano, Dipartimento di Scienze della Terra, via Botticelli 23, 20133 Milano (Italy)
* currently at Università degli Studi di Modena e Reggio Emilia, Dipartimento di Scienze Chimiche e Geologiche, via Giuseppe Campi 103, 41125 Modena (Italy)
** currently at Ideal Standard International, Via Cavassico Inferiore 160, 32026 Trichiana (BL), Italy
Abstract: The spinel gahnite (ZnAl2O4) has been obtained, through a hydrothermal synthesis method, with a grain size of about 2 nm. The sample was calcined for a few hours at two different temperatures (800 and 900°C), in order to obtain larger grain sizes, to be analyzed by means of powder diffraction with the Rietveld method, and by means of total scattering with the PDF method. The idea is to compare the average and the local structure, as a function of increasing grain size. Total scattering data were collected @ESRF. The samples have been also characterized by means of high resolution TEM, showing an increasing grain size, up to 7 nm. The average structure showed variations in the inversion degree, and an increase in grain size. TEM observations showed that the small crystals are well crystallized: the high-resolution images showed neatly the atomic planes even in the smallest particles. However, the average structure did not fit properly the PDF data in the local region, owing to a slightly different coordination among the octahedra.