Desorption/ionization mass spectrometry on array of silicon micro tips

Author

Górecka-Drzazga, Anna ; Dziuban, Jan ; Drzazga, Wlodzimierz ; Kraj, Agnieszka ; Silberring, J.

Author_Institution

Fac. of Microsyst. Electron. & Photonics, Wroclaw Univ. of Technol., Poland

fYear

2004

fDate

11-16 July 2004

Firstpage

290

Lastpage

291

Abstract

We have shown that a sample of bio-species deposited onto the spot of the array of protruded metal gated silicon tips (DIOST) may be effectively ionized and evaporated by UV laser pulsed light illumination. This phenomenon has been never observed on flat surface of silicon dioxide or TiW-Au thin film layers the materials which were used in construction of the tips array. Nature of this process is not known; the most intriguing fact is the protonization as well as negative electron ionization of bio-samples. The new DIOST platform was used for TOF MS tests, and clearly readable, low-noised mass spectrograms of LGG and dopamine were observed.

Keywords

desorption; gold; ionisation; lighting; mass spectra; silicon; silicon compounds; thin films; titanium compounds; Si; TOF MS tests; TiW-Au; UV laser pulsed light illumination; bio-samples; bio-species; desorption/ionization mass spectrometry; low-noised mass spectrograms; microtips arrays; negative electron ionization; protonization; protruded metal gated silicon tips; Biological materials; Building materials; Ionization; Lighting; Mass spectroscopy; Optical arrays; Optical pulses; Pulsed laser deposition; Semiconductor thin films; Silicon compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference, 2004. IVNC 2004. Technical Digest of the 17th International

Print_ISBN

0-7803-8397-4

Type

conf

DOI

10.1109/IVNC.2004.1355020

Filename

1355020