Laser ablation synthesis of new gold tellurides using tellurium and nanogold as precursors. Laser desorption ionisation time-of-flight mass spectrometry
| Authors | |
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| Year of publication | 2013 |
| Type | Article in Periodical |
| Magazine / Source | Rapid Commun. Mass Spectrom |
| MU Faculty or unit | |
| Citation | |
| Web | http://onlinelibrary.wiley.com/doi/10.1002/rcm.6613/pdf |
| Doi | http://dx.doi.org/10.1002/rcm.6613 |
| Field | Analytic chemistry |
| Keywords | Laser Desorption Ionisation (LDI); nanogold-Te; DCSBD |
| Description | RATIONALE: 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 AumTen (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 AumTenClx 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. |
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