19340-03-5Relevant academic research and scientific papers
Platinum nanoflowers on scratched silicon by galvanic displacement for an effective SALDI substrate
Kawasaki, Hideya,Yao, Teruyuki,Suganuma, Takashi,Okumura, Kouji,Iwaki, Yuichi,Yonezawa, Tetsu,Kikuchi, Tatsuya,Arakawa, Ryuichi
, p. 10832 - 10843 (2010)
We report a new and facile method for synthesizing 3D platinum nanoflowers (Pt Nfs) on a scratched silicon substrate by electroless galvanic displacement and discuss the applications of the Pt Nfs in surface-assisted laser desorption/ionization-mass spectrometry (SALDI-MS). Surface scratching of n-type silicon is essential to induce Pt Nf growth on a silicon substrate (to obtain a Pt Nf silicon hybrid plate) by the galvanic displacement reaction. The Pt Nf silicon hybrid plate showed excellent SALDI activity in terms of the efficient generation of protonated molecular ions in the absence of a citrate buffer. We propose that the acidity of the Si-OH moieties on silicon increases because of the electron-withdrawing nature of the Pt Nfs; hence, proton transfer from the Si-OH groups to the analyte molecules is enhanced, and finally, thermal desorption of the analyte ions from the surface occurs. Signal enhancement was observed for protonated molecular ions produced from a titania nanotube array (TNA) substrate on which Pt nanoparticles had been photochemically deposited. Moreover, surface modification of the Pt Nf silicon hybrid plate by perfluorodecyltrichlorosilane (FDTS) (to obtain an FDTS-Pt Nf silicon hybrid plate) was found to facilitate soft SALDI of labile compounds. More interestingly, the FDTS-Pt Nf silicon hybrid plate acts 1) as a high-affinity substrate for phosphopeptides and 2) as a SALDI substrate. The feasibility of using the FDTS-Pt Nf silicon hybrid plate for SALDI-MS has been demonstrated by using a β-casein digest and various analytes, including small molecules, peptides, phosphopeptides, phospholipids, carbohydrates, and synthetic polymers. The hybridization of Pt Nfs with a scratched silicon substrate has been found to be important for achieving excellent SALDI activity.
Determination of internal energy distributions of laser electrospray mass spectrometry using thermometer ions and other biomolecules
Flanigan, Paul M.,Shi, Fengjian,Perez, Johnny J.,Karki, Santosh,Pfeiffer, Conrad,Schafmeister, Christian,Levis, Robert J.
, p. 1572 - 1582 (2014/08/18)
(Figure Presented) The internal energy distributions for dried and liquid samples that were vaporized with femtosecond duration laser pulses centered at 800 nm and postionized by electrospray ionization-mass spectrometry (LEMS) were measured and compared
Surface acoustic wave nebulization produces ions with lower internal energy than electrospray ionization
Huang, Yue,Turecek, Frantisek,Yoon, Sung Hwan,Heron, Scott R.,Masselon, Christophe D.,Edgar, J. Scott,Goodlett, David R.
, p. 1062 - 1070,9 (2020/08/24)
Surface acoustic wave nebulization (SAWN) has recently been reported as a novel method to transfer non-volatile analytes directly from solution to the gas phase for mass spectrometric analysis. Here we present a comparison of the survival yield of SAWN ve
Conformational investigation of N-aralkylpyridinium ions by Cotton-Mouton effect method
Bulgarevich, S. B.,Bren, D. V.,Movshovic, D. Y.,Finocchiaro, P.,Failla, S.
, p. 147 - 156 (2007/10/02)
Molar Cotton-Mouton constants and refractions are reported at 298 K for the following N-aralkylpyridinium cations as solutes in water or acetonitrile: (C6H5)CH2(+NC5H5), (4-ClC6H4)CH2(+NC5H5), (3-ClC6H4)CH2(+NC5H5), (3-ClC
