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Sökning: id:"swepub:oai:DiVA.org:kth-175201" > Rational surface mo...

  • Giri, Anupam (författare)

Rational surface modification of Mn3O4 nanoparticles to induce multiple photoluminescence and room temperature ferromagnetism

  • Artikel/kapitelEngelska2013

Förlag, utgivningsår, omfång ...

  • Royal Society of Chemistry,2013
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:kth-175201
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175201URI
  • https://doi.org/10.1039/c3tc00709jDOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • QC 20160331
  • Surface modification can have a significant influence on the materials behavior at the nanoscale and can lead to nanostructures with novel properties. Here, we demonstrate the surface modification induced multiple photoluminescence and room temperature ferromagnetic activation of Mn3O4 nanoparticles (NPs). Employing a systematic variation of the ligands, their functional groups and the structural position of the functional groups, we have identified the necessary and sufficient structural requirements of the surface co-ordinating ligands, in order to induce unprecedented optical/magnetic responses from the NPs. Using a multitude of spectroscopic techniques, we have investigated the mechanism behind the emergence of the multiple photoluminescence (PL), and it is revealed that the presence of a α-hydroxy carboxylate moiety in the ligands is necessary to activate the Jahn-Teller (J-T) splitting of Mn3+ ions on the NP surface and the corresponding d-d transitions along with the ligand-to-metal charge transfer transitions (LMCT, associated with Mn2+/3+-ligand interactions) is the key factor. However, the presence of a carboxylate group on the surface coordinating ligands is sufficient to activate the room temperature ferromagnetism of the NPs. Moreover, it has been observed that the ligands that induced the smallest crystal field splitting energy (CFSE) resulted in the strongest ferromagnetic activation of the NPs. Finally, the functionalized material has been identified as an efficient catalyst for the photo-degradation of a model cationic organic dye. Apart from the fundamental scientific interest, these results represent a promising route for the rational design of Mn 3O4 NPs adaptable to diverse applications.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Goswami, N. (författare)
  • Pal, M. (författare)
  • Zar Myint, M. T. (författare)
  • Al-Harthi, S. (författare)
  • Singha, A. (författare)
  • Ghosh, B. (författare)
  • Dutta, JoydeepDeparment in Nanotechnology, Water Research Center, Sultan Qaboos University, Al-Khoudh, Oman(Swepub:kth)u1dajeit (författare)
  • Pal, S. K. (författare)
  • Deparment in Nanotechnology, Water Research Center, Sultan Qaboos University, Al-Khoudh, Oman (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Journal of Materials Chemistry C: Royal Society of Chemistry1:9, s. 1885-18952050-75262050-7534

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