Journal ArticleDOI
Characterization of Zirconium Phosphate/Polycation Thin Films Grown by Sequential Adsorption Reactions
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TLDR
In this article, a multilayer thin film consisting of anionic α-zirconium phosphate (α-ZrP) sheets and polycations (poly(allylamine hydrochloride) (PAH), cytochrome c) were characterized by transmission electron microscopy (TEM), ellipsometry, UV−visible absorbance spectroscopy, reflectance FT-IR, XPS, and X-ray diffraction.Abstract:
Monolayer and multilayer thin films consisting of anionic α-zirconium phosphate (α-ZrP) sheets and polycations (poly(allylamine hydrochloride) (PAH), cytochrome c) were characterized by transmission electron microscopy (TEM), ellipsometry, UV−visible absorbance spectroscopy, reflectance FT-IR, XPS, and X-ray diffraction. Titration and powder X-ray diffraction experiments confirm that exfoliation of α-ZrP begins to occur when enough tetra(n-butylammonium) hydroxide (TBA+OH-) has been added to exceed single-layer packing of TBA+ ions (x ≈ 0.50) in the intercalation compound Zr(HPO4)2-x(TBA+PO4-)x·nH2O. The identical contrast of many sheets in TEM micrographs suggests that the suspension is unilamellar. Alternately dipping cationic substrates into α-ZrP-containing suspensions and aqueous PAH gives a multilayer film that resembles the corresponding bulk intercalation compound. X-ray photoelectron spectra of multilayer films show that they are Zr-rich, relative to α-ZrP, consistent with some corrosion during t...read more
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Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene
Sheneve Z. Butler,Shawna M. Hollen,Linyou Cao,Yi Cui,Yi Cui,Jay Gupta,Humberto R. Gutierrez,Tony F. Heinz,Seung Sae Hong,Seung Sae Hong,Jiaxing Huang,Ariel Ismach,Ezekiel Johnston-Halperin,Masaru Kuno,Vladimir V. Plashnitsa,Richard D. Robinson,Rodney S. Ruoff,Sayeef Salahuddin,Jie Shan,Li Shi,Michael G. Spencer,Mauricio Terrones,Wolfgang Windl,Joshua E. Goldberger +23 more
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Positively Charged Nanosheets Derived via Total Delamination of Layered Double Hydroxides
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Exfoliating layered double hydroxides in formamide: a method to obtain positively charged nanosheets
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References
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