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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Latorre-Sánchez, Marcos Primo, Ana Atienzar, Pedro Forneli, Amparo García, Hermenegildo |
| Description | Country affiliation: Spain Author Affiliation: Latorre-Sánchez M ( Instituto Universitario de Tecnología Química, Univ. Politécnica de Valencia, Av. De los Naranjos s/n, 46022, Valencia, Spain.) |
| Abstract | Nitrogen-doped graphene [(N)G] obtained by pyrolysis at 900 °C of nanometric chitosan films exhibits a Hall effect characteristic of n-type semiconductors. In contrast, boron-doped graphene [(B)G] obtained by pyrolysis of borate ester of alginate behaves as a p-type semiconductor based also on the Hall effect. A p–n heterojunction of (B)G-(N)G films is built by stepwise coating of a quartz plate using a mask. The heterojunction is created by the partial overlapping of the (B)G-(N)G films. Upon irradiation with a xenon lamp of aqueous solutions of $H_{2}PtCl_{6}$ and $MnCl_{2}$ in contact with the heterojunction, preferential electron migration from (B)G to (N)G with preferential location of positive holes on (B)G is established by observation in scanning electron microscopy of the formation of Pt nanoparticles (NP) on (N)G and $MnO_{2}$ NP on (B)G. The benefits of the heterojunction with respect to the devices having one individual component as a consequence of the electron migration through the p-n heterojunction are illustrated by measuring the photocurrent in the (B)G-(N)G heterojunction (180% current enhancement with respect to the dark current) and compared it to the photocurrent of the individual (B)G (15% enhancement) and (N)G (55% enhancement) components. |
| File Format | HTM / HTML |
| ISSN | 16136810 |
| Issue Number | 8 |
| Volume Number | 11 |
| e-ISSN | 16136829 |
| Journal | Small |
| Language | English |
| Publisher | Wiley-VCH |
| Publisher Date | 2015-02-25 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Nanotechnology Biomass Chitosan Chemistry Graphite Semiconductors Alginates Borates Boron Catalysis Electrons Esters Microscopy, Electron, Scanning Nanostructures Nitrogen Optics And Photonics Photochemistry Spectrum Analysis, Raman Temperature Water Xenon Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Medicine Biomaterials Engineering Biotechnology |
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