Nanoplates

The same approach with Ni-thiolate precursor has also successfully produced rhombohedral NiS (millerite) nanorods and triangular nanoplates with a nearly 1 1 ratio (Fig. 20.2) [5]. The lengths of nanorods are controllable through different heating conditions and range from 15 to 50 nm with aspect ratios of approximately 4. The pyrolysis temperature and the reactant concentration, when the precursor was prepared, mainly influence the rod or triangle proportions. 

Photoluminescence from gold nanoplates induced by near-field two-photon absorption. Appl. Phys. Lett., 88, 023104 (3 pages). 

Jiang L-P, Xu S, Zhu JM, Zhang JR, Zhu JJ, Chen HY (2004) Ultrasonic-assisted synthesis of monodisperse single-crystalline silver nanoplates and gold nanorings. Inorganic Chem 43 5877-5883... 

Microwave hydrothermal synthesis and visible-light photocatalytic activity of y-Bi2Mo06 nanoplates. Materials Chemistry and Physics, 110, 332-336. 

TEM study of regulated mesoporous Mn203 hexagonal nanoplates... 

Keywords Mesopores Hexagonal nanoplates Manganese oxides TEM. 

Figure 1. (left) Powder XRD pattern of 700 °C-calcined sample cubic M112O3 (right) SEM images of the hexagonal nanoplates of (a) as-synthesized and (b) 700 °C-calcined samples. 

Figure 3. Low-magnification TEM images and the corresponding SAED patterns of the nanoplates with the [311] zone axis of a-Mn203.

Yun WS et al. (2005) Size-Controlled Synthesis of Machinable Single Crystalline Gold Nanoplates. Chem Mater 17(22) 5558-5561... 

Chen S, Carroll DL (2002) Synthesis and Characterization of Truncated Triangular Silver Nanoplates. Nano Lett 2 1003-1007... 

Dong S, Jin Y, Shao Y (2004) Synthesis of Gold Nanoplates by Asparate Reduction of Gold Chloride. Chem Commun... 

Uwada T, Asahi T, Masuhara H, Ibano D, Fujishiro M, Tominaga T (2007) Multiple resonance modes in localized surface plasmon of single hexagonal/triangular gold nanoplates. Chem Lett 36(2) 318-319... 

Huang W-L, Chen C-H, Huang MH (2007) Investigation of the Growth Process of Gold Nanoplates Formed by Thermal Aqueous Solution Approach and the Synthesis of Ultra-Small Gold Nanoplates. J Phys Chem C lll(6) 2533-2538... 

Recently, the chemical synthesis of micrometer-scale mirrors based on Au nanoparticles and Ca2Nb3O10 nanoplates has been reported. Thus, the reaction of Ca2Nb3Oio nanoplates with 3-aminopropyltrimethoxysilane produces 3-aminopro-pylsilyl-perovskite plates. The nanoparticle mirror is produced upon addition of a... 

Figure 21.7 (a) and (b) show AEM images of individual nanoplates obtained after dissolution of the... 

Rocha, T.C.R., Winnischofer, H., Westphal, E., and Zanchet, D. 2007. Formation kinetics of silver triangular nanoplates. Journal of Physical Chemistry, C, 111 2885. 

Since ceria exhibits a cubic fluorite crystal structure, the noncubic nanostructures, such as NRs, NWs, and nanoplates, are fabricated under experimental conditions that are suitable to break dovm the symmetry. One general way is to exploit an appropriate intermediate, such as Ce(OH)3 or Ce(OH)C03. The rare earth hydroxide crystalline NRs/NWs/ NTs are obtained in basic solutions imder hydrothermal treatment, which is discussed in Section 2.3. If certain oxidant is present in the hydrothermal treatment, the ceria NCs could be obtained in a one pot manner. In this way, rod-like, wire-like, or tube-like nanoceria could be synthesized. If the hydrothermal treatment is carried out under oxygen free... 

FIGURE 20 TEM image of CeOj nanopolyhedra, EU2O3 nanodisks and nanoplates Reprinted with permission from Si et al. (2005). Copyright 2005 Wiley-VCH. 

Paek et al. (2007)reported the synthesis of colloidal nanorings and nanoplates of several rare earth metal oxides from thermal dehydration of hydrolyzed metal precursor-surfactant aggregates (Figure 21). The Gd (acac)3 precursor was hydrolyzed at a low temperature of 90 °C and latter, the hydrolyzed precursor-surfactant aggregates were heated to 320 °C for thermal decomposition. Colloidal cubic R2O3 nanorings and nanoplates were obtained. 

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