SCImago Journal & Country Rank

SCImago Journal & Country Rank 

The SCImago Journal & Country Rank is a portal that includes the journals and country scientific indicators developed from the information contained in the Scopus® database (Elsevier B.V.). These indicators can be used to assess and analyze scientific domains.

This platform takes its name from the SCImago Journal Rank (SJR) indicator, developed by SCImago from the widely known algorithm Google PageRank™. This indicator shows the visibility of the journals contained in the Scopus® database from 1996.

SCImago is a research group from the Consejo Superior de Investigaciones Científicas (CSIC), University of Granada, Extremadura, Carlos III (Madrid) and Alcalá de Henares, dedicated to information analysis, representation and retrieval by means of visualisation techniques.

As well as SJR Portal, SCImago has developed The Atlas of Science project, which proposes the creation of an information system whose major aim is to achieve a graphic representation of IberoAmerican Science Research. Such representation is conceived as a collection of interactive maps, allowing navigation functions throughout the semantic spaces formed by the maps.

MDPI - Open Access Publishing

MDPI - Open Access Publishing

MDPI is a publisher of peer-reviewed, open access journals since its establishment in 1996.

http://www.mdpi.com/

Cambridge Structural Database System

http://www.ccdc.cam.ac.uk/index.php The CCDC is a non-profit, charitable Institution whose objectives are the general advancement and promotion of the science of chemistry and crystallography for the public benefit. The CCDC serves the scientific community through the acquisition, evaluation, dissemination and use of the world's output of small molecule crystal structures by: Compiling the Cambridge Structural Database (CSD) - the world repository of small-molecule crystal structures Developing scientific products and services - structural knowledge bases and applications software for the life sciences and crystallography Maximising worldwide accessibility to the CSD for scientists in academia and industry Performing and supporting fundamental research using CSD information and CCDC products Promoting and supporting applications of crystal structure information in academia and industry The CCDC is located on the Chemistry Campus of the University of Cambridge. It is self financing and self administering. The company has 51 employees, mostly full time, and is a recognised institute for the training of students for postgraduate degrees of the University.

UPS Database

UPS Database

Ultraviolet electron spectroscopy is used with metallic material, semiconductors, alloys, adsorbed layers. It is dedicated to band structure study.

This technique involves a UV lamp for the radiation source. Ionised helium is emitting light in the ultraviolet range. Depending on the gas flow, i.e. gas density in the ionisation chamber, two different emissions can be obtained. These emissions are classified according to their energy:

He I (21.2 eV)

He II (40.8 eV)

By characterising band structures this spectroscopy allows to: 

• Determine the nature of chemical species being present of the surface of the specimen

• Studying state density at the Fermi level

Determination of the chemical species that are presents at the very surface of a specimen

When two atoms are being bound by a chemical bond, they are building a molecule, the atomic orbitals of these atoms are modified and this new arrangement creates a new equilibrium.

Energy diagram showing two atoms encountering and resulting in a new molecule.

Atom A Molecule AB Atom B

The same process occurs again if a new atom encounters the molecule. In this way, we turn from a chemical binding into a band structure as shown by the following video sequence.

This shows that the band structure of each molecule has its own spectral signature. By studying the structure it is possible to determine the chemical nature of a surface.

http://www.lasurface.com/database/elementaes.php

AES Database

AES Database

http://www.lasurface.com/database/elementaes.php

XPS Database

XPS Database

 

The following pages are meant as an aid in understanding this technique. They are aimed at quickly explaining the fundamentals or simply refreshing your mind. According to your personal knowledge, choose which level suits you best.

http://www.lasurface.com/database/elementxps.php