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

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:kth-175201" > Rational surface mo...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Giri, Anupam (author)

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

Article/chapterEnglish2013

Publisher, publication year, extent ...

Royal Society of Chemistry,2013
printrdacarrier

Numbers

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

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

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.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Nanoteknik hsv//swe
ENGINEERING AND TECHNOLOGY Nano-technology hsv//eng

Added entries (persons, corporate bodies, meetings, titles ...)

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

Related titles

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

Internet link

Find in a library

Journal of Materials Chemistry C (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Giri, Anupam; Goswami, N.; Pal, M.; Zar Myint, M. T.; Al-Harthi, S.; Singha, A.; show more...; Ghosh, B.; Dutta, Joydeep; Pal, S. K.; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Nano technology

Articles in the publication: Journal of Mater ...

By the university: Royal Institute of Technology

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se