Extreme downsizing of spin crossover nanoparticles towards stable colloids in water: A detailed nano-topographic study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F21%3A73612276" target="_blank" >RIV/61989592:15640/21:73612276 - isvavai.cz</a>

Result on the web

<a href="https://pubs.rsc.org/en/content/articlelanding/2021/TC/D1TC03070A" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/TC/D1TC03070A</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d1tc03070a" target="_blank" >10.1039/d1tc03070a</a>

Result language

angličtina

Original language name

Extreme downsizing of spin crossover nanoparticles towards stable colloids in water: A detailed nano-topographic study

Original language description

The investigation and elaboration of the spin-crossover (SCO) phenomenon in two-dimensional (2D) Hofmann-type nanosized SCO materials and the size-reduction effect on the cooperativity and thermodynamic properties of the nanoparticles are still in progress. Liquid phase exfoliation (LPE) as a top-down experimental protocol for the fabrication of 2D SCO atomically thin nanosheets is also an underexplored area of research. Given the increasing scientific interest for 2D nanosheets and their unique thickness-dependent electronic properties, the above-mentioned study is of utmost importance. In this context, we present a detailed nano-synthetic study based on the reverse-micellar synthesis of [Fe-II(2-mpz)(2)Ni(CN)(4)] and further rationalization of this method followed by LPE experimental protocols in order to synthesize nanoparticles with well-controlled sizes and shapes. The role of concentration and reaction temperature is investigated with respect to the size, dispersion, morphology and magnetic properties of the nanoparticles. It was found that for specific values of these parameters, the synthesis of nanoparticles is controlled and the final products are nanoparticles with an agglomerated architecture. According to an extensive atomic force microscopy (AFM) nano-topographic study, this agglomeration is best described as right truncated thick prisms of [Fe-II(2-mpz)(2)Ni(CN)(4)] stacked in a vertical position on a rectangular base plate. During the LPE procedure and by prolonging the sonication period, the thick prisms are detached and, eventually, exfoliated to atomically thin right prisms of height similar to 1 nm. Magnetic measurements revealed that the size reduction leads to the progressive downshift of abrupt thermal hysteresis with two-step SCO transition temperatures of the bulk [Fe-II(2-mpz)(2)Ni(CN)(4)] material to a gradual incomplete SCO behavior of an almost single-layer 2D [Fe-II(2-mpz)(2)Ni(CN)(4)] nanosheet.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

—

Volume of the periodical

9

Issue of the periodical within the volume

43

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

15671-15682

UT code for WoS article

000713347400001

EID of the result in the Scopus database

2-s2.0-85119335027