Ligand-Coated Vanadium Oxide Clusters: Capturing Gas-Phase Magic Numbers in Solution

Ard, Shaun G.; Dibble, Collin J.; Akin, Scott T.; Duncan, M. A.

doi:10.1021/jp200691k

Cited by 25 publications

(45 citation statements)

References 109 publications

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“…7. For the reaction terminated at 15 min, the XRD diffraction features were indexed on the basis of the layered phase V 2 O 5 ÁxH 2 O, consistent with preceding work (Liu et al 2005;Dong et al 2008Dong et al , 2009Ard et al 2011). For the reaction ceased at 30 min, the product contained mixtures of NaVO 3 and b-Na 0.24 V 2 O 5 , whereas the product obtained from reaction duration of 45 min was identified as b-Na 0.24 V 2 O 5 in a pure single phase.…”

Section: Effect Of Reaction Conditionssupporting

confidence: 63%

Controlled growth of β-Na0.24V2O5 nanowire thin films

Weng

et al. 2012

J Nanopart Res

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A method to prepare well-aligned b-Na 0.24 V 2 O 5 nanowires (NWs) involves the deposition of a vanadium oxide complex onto a substrate via gaseous transport, followed by a reaction between the complex and a sodium cation (Na ? ) precursor coated on the substrate. Techniques to investigate the composition, crystallinity, and morphology of products as prepared include ICP-AES, X-ray powder diffraction (PXRD), SEM/transmission electron microscope (TEM), and XPS. PXRD patterns and images from a TEM confirm the single-crystalline nature of b-Na 0.24 V 2 O 5 NWs, which grow along direction [1 0 0]. Factors affecting the amount of deposited material and morphology were tested. On varying the reaction conditions, the length of the b-Na 0.24 V 2 O 5 wires is controlled in a range of 5-25 lm. A mechanism of formation is proposed. According to measurements of field emission, the turn-on field is 7.8 V/lm, and the maximum emission current density of 4.66 mA/cm 2 occurs at field 11 V/lm. This method is applicable to grow other tertiary metal oxide nanostructures on glass substrate.

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Section: Effect Of Reaction Conditionssupporting

confidence: 63%

Controlled growth of β-Na0.24V2O5 nanowire thin films

Weng

et al. 2012

J Nanopart Res

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“…These involved e.g. the combination of laser desorption time-of-flight mass spectrometry, UV-vis and IR spectroscopy, and DFT calculations, 51 or analysis by ESI-MS, collision-induced dissociation experiments and DFT. 52…”

Section: General Remarksmentioning

confidence: 99%

Semimetal-functionalised polyoxovanadates

2015

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Polyoxovanadates (POVs), known for their wide applicability and relevance in chemical, physical and biological sciences, are a subclass of polyoxometalates and usually self-assemble in aqueous-phase, pH-controlled condensation reactions. Archetypical POVs such as the robust [VO42](12-) polyoxoanion can be structurally, electronically and magnetically altered by heavier group 14 and 15 elements to afford Si-, Ge-, As- or Sb-decorated POV structures (heteroPOVs). These main-group semimetals introduce specific chemically engineered functionalities which cause the generally hydrophilic heteroPOV compounds to exhibit interesting reactivity towards organic molecules, late transition metal and lanthanoid ions. The fully-oxidised (V(V)), mixed-valent (V(V)/V(IV) and V(IV)/V(III)), "fully-reduced" (V(IV)) and "highly-reduced" (V(III)) heteroPOVs possess a number of intriguing properties, ranging from catalytic to molecular magnet characteristics. Herein, we review key developments in the synthetic and structural chemistry as well as the reactivity of POVs functionalised with Si-, Ge-, As- or Sb-based heterogroups.

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“…Ligand-coated silver nanoparticles are produced in the gas phase by laser ablation/vaporization [35] in a flow reactor described previously [36,37]. A rotating silver rod is ablated with the output (80−100 mJ/pulse) of a high repetition rate (400 Hz) excimer laser…”

Section: Methodsmentioning

confidence: 99%

Laser synthesis and spectroscopy of acetonitrile/silver nanoparticles

Akin

Liu

Duncan

2015

Chemical Physics Letters

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Silver nanoparticles with acetonitrile ligands are produced in a laser ablation flow reactor. Excimer laser ablation produces gas phase metal clusters which are thermalized with helium or argon collisions in the flowtube, and reactions with acetonitrile vapor coordinate this ligand to the particle surface. The gaseous mixture is captured in a cryogenic trap; warming produces a solution of excess ligand and coated particles. TEM images reveal particle sizes of 10−30 nm diameter. UV-visible absorption and fluorescence spectra are compared to those of standard silver nanoparticles with surfactant coatings. Deep-UV ligand absorption is strongly enhanced by nanoparticle adsorption.

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Ligand-Coated Vanadium Oxide Clusters: Capturing Gas-Phase Magic Numbers in Solution

Cited by 25 publications

References 109 publications

Controlled growth of β-Na0.24V2O5 nanowire thin films

Controlled growth of β-Na0.24V2O5 nanowire thin films

Semimetal-functionalised polyoxovanadates

Laser synthesis and spectroscopy of acetonitrile/silver nanoparticles

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