Physical properties and applications of Na-Co-Fe Prussian Blue analogues and Development of ferromagnetic superspins in bare Cu nanoparticles

• Main Authors: Erdembayalag Batsaikhan, 白萊格
• Other Authors: Wen-Hsien Li
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/qpnt6q

博士 === 國立中央大學 === 物理學系 === 106 === There are two parts in this thesis. The first part focuses on the studies made on the magnetic behavior of bare Cu nanoparticles. The second part focuses on the physical properties and applications of Na-Co-Fe Prussian blue analogues. In the first part, a gas condensation method is employed to fabricate three sets of bare Cu nanoparticles. X-ray diffraction is used to characterize the samples. We determine the mean particle diameters of Cu nanoparticles are determined in range of 6.6 nm to 11.1 nm. Magnetization measurements were pointed out the changes in magnetic properties of Cu nanoparticles with various sizes. The differences in the electron density distributions between bulk and nano-sized Cu are important to understand the observations of ferromagnetic-like development in isothermal magnetization curves of Cu nanoparticles with various sizes. In the second part of this thesis, a coprecipitation method is used to synthesize the Na-Co-Fe Prussian Blue Analogues (PBAs). In order to synthesize samples with different crystalline structures, both the heat treatment and sodium citrate assisted procedures are introduced into sample preparation procedure. Sample characterizations of three different Na-Co-Fe samples are examined by X-ray photoemission spectroscopy and X-Ray diffraction techniques. Moreover, physical properties of these Na-Co-Fe PBAs are investigated by magnetic measurements as well Raman spectroscopy. Furthermore, obtained three frameworks were introduced as the cathode for a secondary battery