J Cuevas's research while affiliated with CARTIF and other places

Publications (3)

Article
Full-text available
Generation of monomobile molecular standards by electrospray (ES) followed by classification in a differential mobility analyzer (DMA) fails at diameters above ∼2 nm because many clusters in different charge states z crowd in a narrow mobility range. Use of a second DMA (DMA2) in series (tandem) with DMA1 is very helpful because, unexpectedly, many...
Article
The charge distribution of polystyrene nanoparticles electrosprayed from l-methyl-2-pyrrolidone (NMP) dimethylammonium formate (10/1 vol.) is studied by a continuous tandem differential mobility analyzer (TDMA) technique. Two DMAs operated in series as narrow band mobility filters are scanned in a quasi-continuous fashion providing highly informati...
Article
The chargedistributionofpolystyrenenanoparticleselectrosprayedfroml-methyl-2- pyrrolidone(NMP)dimethylammoniumformate(10/1vol)isstudiedbya continuous tandem differentialmobilityanalyzer(CTDMA)technique.TwoDMAsoperatedinseries as narrowbandmobilityfiltersarescannedinaquasi-continuousfashionproviding highlyinformativetwo-dimensional(2D)spectra.Thefir...

Citations

... 8 °C rather than 10 °C is chosen to have 'large' ΔTs with 'low' saturator temperatures. High saturator temperatures may cause neutral and or ion evaporation from the clusters during their time of flight in the saturator [48,49]. ...
... This fragmentation is not further discussed in this study but its possibility should be kept in mind. Also, similar studies (Gamero-Casta~ no and Fern andez de la Mora 2000; Attoui et al. 2013a,b) have observed that chargereduced clusters always show lower mobilities than the corresponding pure cluster of that charging state. This indicates that the clusters are discharged by the attachment of gas phase ions, making the product ion somewhat larger and promoting a different mechanism. ...
... Previous studies ; Ude and Fern andez de la Mora 2005) have demonstrated that solutions of tetra-alkyl ammonium halides are well-suited for the clean generation of mobility standards at inverse mobilities below 2 Vs/cm 2 for instrument calibration (Cai et al. 2018;Jiang et al. 2011). It should be noted though that the mobility spectra for cluster ions electrosprayed from tetra-alkyl ammonium halides are dominated by larger multiply charged clusters leading to a too pronounced background to distinguish mobility peaks of singly charged clusters ( Attoui et al. 2013). The analysis of mass spectra showed distinct presence of peaks assigned to multiply charged clusters from tetra-heptyl ammonium bromide (Fern andez de la Mora, Thomson, and Gamero-Casta~ no 2005). ...