含羧/酯基有机分子对氧化铝微粒形态调控作用研究

研究了液相法制备纳米微粒过程中，某些含羧／酯基有机分子（乙酸， 乙酰乙酸乙酯，聚酰胺羧酸盐等）分别在水相和有机相中对氧化铝纳米微粒形态的调控作用，通过选择该类有机物的种类和用量，制备了不同粒径范围的球形和不同长径比的纤维状Al2O3纳米粒子，并结合有关理论讨论了官能氧在不同合成介质中对颗粒形态调控的可能机理。

Shape-controlled Synthesis of Alumina Nanoparticles by Carboxy-containing Organic Molecules

Shape\|control has been much more difficult to be achieved in the synthesis of nanoparticles. For the aim to establish whether a favorable combination of functional organic molecules and inorganic precursors might produce predictable particle morphology, several carboxy\|containing organic compounds, such as acetic acid(AcOH), acetoacetic ester(EAA), poly(amidoamine)dendrimer(PAMAM) and the like, have been investigated in both organic solvent and aqueous solution in the synthesis of Al\-2O\-3 nanoparticles from aluminium alkoxide and aluminium nitrate precursors, respectively. The spherical particles with different size\|ranges(<10 nm, 20\_40 nm, 50\_100 nm), and the fibrous with changed aspect ratios(from \{100 nm/4\} nm to 10 nm/4 nm) were observed and characterized, whose distribution was dependent on the property of organic compounds and its concentration used. A possible shape\|control mechanism was proposed and discussed.