title: Creation of giant two-dimensional crystal of zinc oxide nanodisk by method of single-particle layer of organo-modified inorganic fine particles.
abstract: In this study, the formation and structure of a single-particle layer of organo-zinc oxide are investigated using surface-pressure-area (π-A) isotherms, out-of-plane X-ray diffraction (XRD) analysis, and atomic force microscopy (AFM). Further, techniques for achieving the solubilization of inorganic fine particles in general solvents have been proposed, and a single-particle layer has been formed using such an inorganic solution as a "spreading solution" for an interfacial film. Surface modification of ZnO is performed using a long-chain carboxylic acid. Accordingly, a regular arrangement of ZnO can be easily achieved in order to overcome the relatively weak van der Walls interactions between inorganic materials. A condensed Langmuir monolayer of these particles is also formed. A multiparticle layered structure is constructed by the Langmuir-Blodgett (LB) technique. Out-of-plane XRD measurement results for a single-particle layer of organo-ZnO clearly show a sharp peak at 42 Å. This peak is attributed to the distance between ZnO layers. The AFM image of this single-particle layer of organo-ZnO shows a particle assembly with a uniform height of 60 nm. These aggregated particles form large two-dimensional crystals. In other words, a regular periodic structure along the c-axis and a condensed single-particle layer had been fabricated using Langmuir and LB techniques.
authors.affiliation: Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan.
authors.forename: Qi
authors.initials: Q
authors.lastname: Meng
authors.affiliation: Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan.
authors.forename: Nanami
authors.initials: N
authors.lastname: Honda
authors.affiliation: Chiba Institute of Technology, 17-1, Tsudanuma 2, Narashino, Chiba 275-0016, Japan.
authors.forename: Saki
authors.initials: S
authors.lastname: Uchida
authors.affiliation: Chiba Institute of Technology, 17-1, Tsudanuma 2, Narashino, Chiba 275-0016, Japan.
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Hashimoto
authors.affiliation: Chiba Institute of Technology, 17-1, Tsudanuma 2, Narashino, Chiba 275-0016, Japan.
authors.forename: Hirobumi
authors.initials: H
authors.lastname: Shibata
authors.affiliation: Graduate School of Science and Engineering, Saitama University, 255 Shimo-okubo, Sakura-ku, Saitama 338-8570, Japan. Electronic address: fujimori@fms.saitama-u.ac.jp.
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Fujimori
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D003460:Crystallization; D018625:Microscopy, Atomic Force; D008958:Models, Molecular; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D013499:Surface Properties; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D015034:Zinc Oxide
keywords: Langmuir–Blodgett method; Repeating compression–expansion process; Single-particle layer; Two-dimensional organic/inorganic nanohybrids; Zinc oxide