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Scanning electron microscopic imaging of surface effects in desorption and nano-desorption electrospray ionization

SYSNO ASEP	0363441
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Scanning electron microscopic imaging of surface effects in desorption and nano-desorption electrospray ionization
Author(s)	Kaftan, Filip (UOCHB-X) Kofroňová, Olga (MBU-M)_{RID, ORCID} Benada, Oldřich (MBU-M)_{ORCID, RID} Lemr, Karel (MBU-M)_{RID, ORCID} Havlíček, Vladimír (MBU-M)_{RID, ORCID} Cvačka, Josef (UOCHB-X)_{RID, ORCID} Volný, Michael (MBU-M)_ORCID
Number of authors	7
Source Title	Journal of Mass Spectrometry. - : Wiley - ISSN 1076-5174 Roč. 46, č. 3 (2011), s. 256-261
Number of pages	6 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	ionization ; DESI ; nano-DESI ; electron microscopy ; mass spectrometry
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GPP206/10/P018 GA ČR - Czech Science Foundation (CSF)
	LC545 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	ME10013 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40550506 - UOCHB-X (2005-2011)
	AV0Z50200510 - MBU-M (2005-2011)
UT WOS	000288463900003
DOI	10.1002/jms.1888
Annotation	Scanning electron microscopy was used to investigate rivulets that are formed on the analyzed surface during desorption electrospray ionization (DESI) experiment. Ferromagnetic nanoparticles added to the spray solvent in a form of colloid solution functioned as an additional surface probe. The existence of the rivulets was confirmed on glass and newly demonstrated on two different types of porous PTFE. The results show that in standard DESI set-up the rivulets are arranged into very regular shapes. Same rivulets were obtained in DESI experiments without high voltage on the sprayer. However, no such rivulets or any other regular patterns were found on a surface in nano-DESI (nanospray DESI without the carrier nebulizing gas) experiments. This indicates that symmetrical rivulets are created by the hydrodynamical rather than electrostatic forces. It was also demonstrated that blocking the rivulets by a simple physical barrier did not influence known surface charging effects.
Workplace	Institute of Organic Chemistry and Biochemistry
Contact	asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434
Year of Publishing	2012

Number of the records: 1