PMID- 25286021
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150521
LR  - 20141016
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 16
IP  - 43
DP  - 2014 Nov 21
TI  - A facile route for the synthesis of nanostructured oxides and hydroxides of 
      cobalt using laser ablation synthesis in solution (LASIS).
PG  - 24034-44
LID - 10.1039/c4cp03018d [doi]
AB  - We used a pulsed laser ablation synthesis in solution (LASIS) to produce cobalt 
      oxide/hydroxide nanoparticles (NPs) with tailored size, morphology and structure 
      at different laser fluences, wavelengths (532 and 1064 nm) and solvent 
      conditions. Specifically, LASIS on bulk Co in the presence and absence of O2 in 
      an aqueous solution initially produces cobalt monoxide (CoO) and single crystal 
      beta-cobalt hydroxide (beta-Co(OH)2) nanoparticles (NPs) respectively that finally 
      transform into cobaltosic oxide (Co3O4) through oxidation and/or thermal 
      decomposition. Transmission electron microscopy (TEM) and scanning mobility 
      particle sizer (SMPS) measurements on the final products reveal a bimodal size 
      distribution of agglomerated NPs (for the 1064 and 532 nm laser) at low laser 
      fluences, where the ablation mechanism is dominated by vaporization and normal 
      boiling. In contrast, more efficient and predominant explosive boiling at higher 
      laser fluences produces a mono-modal size distribution of spherically shaped 
      primary NPs in agglomerates. Furthermore, higher absorbance of the 532 nm laser 
      by solution-phase colloidal NPs re-ablates them into spherical shapes of larger 
      size ( approximately 13-22 nm) as compared to the ones from using 1064 nm LASIS ( approximately 10-14 nm), 
      while rendering 532 nm LASIS less productive than 1064 nm LASIS over an extended 
      period of time. Finally, Co3O4 nanorods with enhanced localized surface plasmon 
      resonance (LSPR) are synthesized at high pH (pH >/= 13) and low laser fluence (<5 
      mJ cm(-2)) conditions. Such nanostructured materials are promising candidates as 
      photocatalysts or additives in nanocomposite materials with enhanced light 
      absorption properties.
FAU - Hu, Sheng
AU  - Hu S
AD  - Department of Chemical and Biomolecular Engineering, University of Tennessee, 
      Knoxville, Tennessee 37996, USA. dmukherj@utk.edu.
FAU - Melton, Chad
AU  - Melton C
FAU - Mukherjee, Dibyendu
AU  - Mukherjee D
LA  - eng
PT  - Journal Article
DEP - 20141006
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2014/10/07 06:00
MHDA- 2014/10/07 06:01
CRDT- 2014/10/07 06:00
PHST- 2014/10/07 06:00 [entrez]
PHST- 2014/10/07 06:00 [pubmed]
PHST- 2014/10/07 06:01 [medline]
AID - 10.1039/c4cp03018d [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2014 Nov 21;16(43):24034-44. doi: 10.1039/c4cp03018d. Epub 
      2014 Oct 6.