title: Laser ablation synthesis of new gold tellurides using tellurium and nanogold as precursors. Laser desorption ionisation time-of-flight mass spectrometry.
abstract: BACKGROUND
  Only a few gold tellurides are known. However, Laser Ablation Synthesis (LAS) using Laser Desorption Ionisation (LDI) time-of-flight mass spectrometry (TOF MS) has high potential for the generation of new compounds.
  
  
  METHODS
  LDI of nanogold-Te conjugate using a nitrogen laser 337 nm was applied while the mass spectra were recorded in positive and negative ion modes using a quadrupole ion trap-TOF mass spectrometer equipped with a reflectron. Diffuse coplanar surface barrier discharge was applied for the plasma treatment of glass and silicon surfaces.
  
  
  RESULTS
  A form of nanogold-Te conjugate was prepared and found suitable for LAS of gold tellurides. Several new Au(m)Te(n) (m = 1-11; n = 1-4) clusters were identified. An excess of nanogold and chloride or an excess of auric acid caused the formation of mixed Au(m)Te(n)Cl(x) clusters. The nanogold-Te conjugate can be deposited from an aqueous suspension onto glass while the deposition is strongly enhanced if the surface is modified by plasma.
  
  
  CONCLUSIONS
  LDI of nanogold-Te conjugate is a suitable procedure for the generation of new gold telluride clusters. Treatment of borosilicate glass with a diffuse coplanar surface barrier discharge strongly enhances the deposition of gold tellurides on glass while limited adsorption on a silicon surface was observed.
authors.affiliation: Department of Chemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.
authors.forename: Katarína
authors.initials: K
authors.lastname: Svihlová
authors.forename: Lubomír
authors.initials: L
authors.lastname: Prokeš
authors.forename: Dana
authors.initials: D
authors.lastname: Skácelová
authors.forename: Eladia María
authors.initials: EM
authors.lastname: Peña-Méndez
authors.forename: Josef
authors.initials: J
authors.lastname: Havel