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Quantitative Analysis of Calcium Phosphate Nanocluster Growth Using Time-of-Flight Medium-Energy-Ion-Scattering Spectroscopy

Title
Quantitative Analysis of Calcium Phosphate Nanocluster Growth Using Time-of-Flight Medium-Energy-Ion-Scattering Spectroscopy
Authors
Park, JiminYang, Ki DongKim, Na-YoungJung, Kang-WonLe, Viet-DucLim, Hee-JinAn, JunghyunJin, KyoungsukKim, Yong-HyunNam, Ki TaeMoon, Daewon
DGIST Authors
Moon, Daewon
Issue Date
2018-09
Citation
ACS Central Science, 4(9), 1253-1260
Type
Article
Article Type
Article
Keywords
Calcium phosphateNanoclustersPlasma interactionsCompositional ratioFirst-principles studyInorganic materialsMedium energy ion scatteringMedium energy ion scattering spectroscopiesNon-collagenous proteinsNucleation and growthSpecific interactionLigands
ISSN
2374-7943
Abstract
One of the remaining challenges in material chemistry is to unveil the quantitative compositional/structural information and thermodynamic nature of inorganic materials especially in the initial nucleation and growth step. In this report, we adopted newly developed time-of-flight medium-energy-ion-scattering (TOF-MEIS) spectroscopy to address this challenge and explored heterogeneously grown nanometer-sized calcium phosphate as a model system. With TOF-MEIS, we discovered the existence of calcium-rich nanoclusters (Ca/P ∼ 3) in the presence of the non-collagenous-protein-mimicking passivating ligands. Over the reaction, these clusters progressively changed their compositional ratio toward that of a bulk phase (Ca/P ∼ 1.67) with a concurrent increase in their size to ∼2 nm. First-principles studies suggested that the calcium-rich nanoclusters can be stabilized through specific interactions between the ligands and clusters, emphasizing the important role of template on guiding the chemical and thermodynamic nature of inorganic materials at the nanoscale. © 2018 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/9342
DOI
10.1021/acscentsci.8b00436
Publisher
American Chemical Society
Related Researcher
  • Author Moon, Daewon NanoBio Imaging Laboratory
  • Research Interests Coherent Raman Scattering; Surface Plasmon Resonance Imaging Ellipsometry; Imaging Mass Spectrometry; Time-of-flight Medium Energy Ion Scattering
Files:
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Collection:
Department of New BiologyNanoBio Imaging Laboratory1. Journal Articles


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