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Production of Anthracene (C14H10) Clusters using Cold Aerodynamic Source (CAS) and Verification of the Products via Time of Flight Spectroscopy

Algharbi, Saloan LU (2013) FYSM31 20121
Department of Physics
Abstract
Molecular cluster is a nanoparticle that is defined as an agglomerate of few up to 106-7 of molecules (corresponding to 1- 100 nm in size) that can be manipulated by the cluster beams. Molecular cluster properties typically lie between the individual molecule and bulk matter properties.
This work describes the employment of the Cold Aerodynamic Source (CAS) to produce a narrow, collimated and isolated beam of molecular clusters in gas phase and to prepare it for the spectroscopic studies. CAS was constructed in the University of Gothenburg in Sweden by Sasa Vuckovic as part of his PhD thesis to produce different types of cluster beams.
CAS consists of an aggregation chamber, an aerodynamic lens system and an expansion chamber. The... (More)
Molecular cluster is a nanoparticle that is defined as an agglomerate of few up to 106-7 of molecules (corresponding to 1- 100 nm in size) that can be manipulated by the cluster beams. Molecular cluster properties typically lie between the individual molecule and bulk matter properties.
This work describes the employment of the Cold Aerodynamic Source (CAS) to produce a narrow, collimated and isolated beam of molecular clusters in gas phase and to prepare it for the spectroscopic studies. CAS was constructed in the University of Gothenburg in Sweden by Sasa Vuckovic as part of his PhD thesis to produce different types of cluster beams.
CAS consists of an aggregation chamber, an aerodynamic lens system and an expansion chamber. The presence of helium carrier gas, which is mixed with the gas of the anthracene (C14H10) (produced by resistive heating of the solid anthracene) at low operating pressure that reaches 10 mbar, induces the anthracene molecules to bind together through lowering their internal energy as well as preventing them from sticking to the walls of the source and producing different sizes of anthracene clusters. The 10 mbar inlet pressure for the gas mixture (anthracene clusters - helium) enters the aerodynamic lens system (ALS) consisting of five thin orifices allowing specific sizes of anthracene clusters (C14H10)n to focus near the symmetry axis of the device. A highly collimated beam of anthracene clusters for a spectroscopic study was prepared through expanding the gas mixture through the nozzle into an evacuated chamber. The helium gas was skimmed from the beam by a skimmer, which is located at 5mm apart from the nozzle. The simulation software "FLUENT 6.2.22" has been utilized to examine the ALS performance and showed that particles with sizes below 30 nm could be focused.
Time of flight mass spectrometry (TOFMS) has been used in this work to characterize the beam through identifying the beam components according to their times of the flight which were absolutely proportional to the square root of their mass-to-charge ratio. (Less)
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author
Algharbi, Saloan LU
supervisor
organization
course
FYSM31 20121
year
type
H2 - Master's Degree (Two Years)
subject
keywords
- Clusters source "Cold Aerodynamic Source(CAS)". - Anthracene (C14H10). - Time of Flight Spectroscopy.
language
English
id
3632441
date added to LUP
2013-04-24 14:05:46
date last changed
2013-04-24 14:05:46
@misc{3632441,
  abstract     = {Molecular cluster is a nanoparticle that is defined as an agglomerate of few up to 106-7 of molecules (corresponding to 1- 100 nm in size) that can be manipulated by the cluster beams. Molecular cluster properties typically lie between the individual molecule and bulk matter properties. 
This work describes the employment of the Cold Aerodynamic Source (CAS) to produce a narrow, collimated and isolated beam of molecular clusters in gas phase and to prepare it for the spectroscopic studies. CAS was constructed in the University of Gothenburg in Sweden by Sasa Vuckovic as part of his PhD thesis to produce different types of cluster beams.
CAS consists of an aggregation chamber, an aerodynamic lens system and an expansion chamber. The presence of helium carrier gas, which is mixed with the gas of the anthracene (C14H10) (produced by resistive heating of the solid anthracene) at low operating pressure that reaches 10 mbar, induces the anthracene molecules to bind together through lowering their internal energy as well as preventing them from sticking to the walls of the source and producing different sizes of anthracene clusters. The 10 mbar inlet pressure for the gas mixture (anthracene clusters - helium) enters the aerodynamic lens system (ALS) consisting of five thin orifices allowing specific sizes of anthracene clusters (C14H10)n to focus near the symmetry axis of the device. A highly collimated beam of anthracene clusters for a spectroscopic study was prepared through expanding the gas mixture through the nozzle into an evacuated chamber. The helium gas was skimmed from the beam by a skimmer, which is located at 5mm apart from the nozzle. The simulation software "FLUENT 6.2.22" has been utilized to examine the ALS performance and showed that particles with sizes below 30 nm could be focused.
Time of flight mass spectrometry (TOFMS) has been used in this work to characterize the beam through identifying the beam components according to their times of the flight which were absolutely proportional to the square root of their mass-to-charge ratio.},
  author       = {Algharbi, Saloan},
  keyword      = {- Clusters source "Cold Aerodynamic Source(CAS)". - Anthracene (C14H10). - Time of Flight Spectroscopy.},
  language     = {eng},
  note         = {Student Paper},
  title        = {Production of Anthracene (C14H10) Clusters using Cold Aerodynamic Source (CAS) and Verification of the Products via Time of Flight Spectroscopy},
  year         = {2013},
}