Carbon nitrides: synthesis and characterization of a new class of functional materials

Carbon nitride compounds with high N[thin space (1/6-em)]:[thin space (1/6-em)]C ratios and graphitic to polymeric structures are being investigated as potential next-generation materials for incorporation in devices for energy conversion and storage as well as for optoelectronic and catalysis applications. The materials are built from C- and N-containing heterocycles with heptazine or triazine rings linked via sp2-bonded N atoms (N(C)3 units) or –NH– groups. The electronic, chemical and optical functionalities are determined by the nature of the local to extended structures as well as the chemical composition of the materials. Because of their typically amorphous to nanocrystalline nature and variable composition, significant challenges remain to fully assess and calibrate the structure–functionality relationships among carbon nitride materials. It is also important to devise a useful and consistent approach to naming the different classes of carbon nitride compounds that accurately describes their chemical and structural characteristics related to their functional performance. Here we evaluate the current state of understanding to highlight key issues in these areas and point out new directions in their development as advanced technological materials.Our work on carbon nitride materials has been supported by the EPSRC (EP/L017091/1) and the EU Graphene Flagship grant agreement No. 696656 - GrapheneCore1. Additional support to advance the science and technology of these materials was also received from the UCL Enterprise Fund and the Materials Innovation Impact Acceleration funding enabled by the UK EPSRC

Bidet nail syndrome: report of a typical case

Worn-down nail syndrome is a nail disordercharacterized by thinning of the distal nail plateinduced by repetitive mechanical trauma. A Frenchvariant, entitled “bidet nail syndrome” was firstdescribed by Baran

Bidet nail syndrome: report of a typical case

Worn-down nail syndrome is a nail disordercharacterized by thinning of the distal nail plateinduced by repetitive mechanical trauma. A Frenchvariant, entitled “bidet nail syndrome” was firstdescribed by Baran

Longitudinal melanonychia in children: a clinical and histopathologic study of 40 cases.

Very little has been published on longitudinal melanonychia in children. Our objective was to determine the nature of melanocytic lesions in pediatric patients with longitudinal or total melanonychia and to look for correlations between clinical and histologic features.Journal Articleinfo:eu-repo/semantics/publishe

From phosphate rocks to uranium raw materials: hybrid materials designed for selective separation of uranium from phosphoric acid

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