Using evolved gas analysis-mass spectrometry to characterize adsorption on a nanoparticle surface
Martínez-Esaín, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Puig i Molina, Mª Teresa (Institut de Ciència de Materials de Barcelona)
Obradors, Xavier (Institut de Ciència de Materials de Barcelona)
Ros i Badosa, Josep (Universitat Autònoma de Barcelona. Departament de Química)
Farjas, Jordi (Universitat de Girona)
Roura, Pere (Universitat de Girona)
Faraudo, Jordi (Institut de Ciència de Materials de Barcelona)
Yáñez López, Ramón (Universitat Autònoma de Barcelona. Departament de Química)
Ricart, Susana (Institut de Ciència de Materials de Barcelona)

Data:	2019
Resum:	The surface chemistry of nanoparticles is the key factor to control and predict their interactions with molecules, ions, other particles, other materials, or substrates, determining key properties such as nanoparticle stability or biocompatibility. In consequence, the development of new techniques or modification of classical techniques to characterize nanoparticle surfaces is of utmost importance. Here, a classical analysis technique, thermally evolved gas analysis-mass spectrometry (EGA-MS), is employed to obtain an image of the nanoparticle-solvent interface, unraveling the molecules present on the surface. As the use of complementary techniques is urged, the validity of EGA-MS characterization is corroborated by comparison with a previously reported surface characterization method. Previous studies were based on several experimental techniques and MD simulations using YF nano/supraparticles and LaF nanoparticles as model systems. We demonstrate the applicability of this technique in two differently sized systems and two systems composed of the same ions on their surface but with a different inorganic core (e. g. LaF and YF nanoparticles). The results described in this paper agree well with our previous results combining experimental techniques and MD simulations. EGA-MS not only revealed the ions attached to the nanoparticle surface but also shed light on their coordination (e. g. citrate attached to one or two carboxylate moieties). Thus, we show that EGA-MS is a useful and efficient technique to characterize the surface chemistry of nanoparticles and to control and predict their final properties.
Ajuts:	European Commission 280432 Ministerio de Ciencia e Innovación RTI2018-095853-B-C22 Ministerio de Ciencia e Innovación RTI2018-095853-B-C21 Ministerio de Economía y Competitividad SEV-2015-0496 Ministerio de Economía y Competitividad MAT2015-68994-REDC Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-1519
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Analysis techniques ; Carboxylate moiety ; Classical techniques ; Complementary techniques ; Evolved gas analysis ; Experimental techniques ; Nanoparticle surface ; Surface characterization
Publicat a:	Nanoscale advances, Vol. 1, issue 7 (2019) , p. 2740-2747, ISSN 2516-0230

DOI: 10.1039/c9na00098d
PMID: 36132724

8 p, 1.1 MB

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