胶体金和甘氨酸渗透合成蛋白石的二次发射
Secondary emission from synthetic opal infiltrated by colloidal gold and glycine
摘要：
比较了光子晶体（PC）的二次发射（光致发光）和布拉格反射光谱，即合成蛋白石、胶体金、甘氨酸和胶体金与甘氨酸的复合物渗透的蛋白石。胶体金和胶体金与甘氨酸的复合物渗入PC的孔中引起布拉格反射的短波长移动（约5-15 nm），并使该带的强度增加1.5-3倍。在光致发光中，胶体金和甘氨酸胶体金对PC的渗透抑制了PC在375-450 nm附近的发射带，增强了PC在470-510 nm区域的阻带肩。所观察到的PC发射带的形状与合成蛋白石中的缺陷相连接，是由渗透层的类型和激发波长决定的。对可能的作用机制进行了讨论。
英文摘要：
A comparison of the secondary emission (photoluminescence) and Bragg reflection spectra of photonic crystals (PC), namely, synthetic opals, opals infiltrated by colloidal gold, glycine, and a complex of colloidal gold with glycine is performed. The infiltration of colloidal gold and a complex of colloidal gold with glycine into the pores of PC causes a short-wavelength shift (about 5-15 nm) of the Bragg reflection and increases the intensity of this band by 1.5-3 times. In photoluminescence, the infiltration of PC by colloidal gold and colloidal gold with glycine suppresses the PC emission band near 375-450 nm and enhances the shoulder of the stop-zone band of PC in the region of 470-510 nm. The shape of the observed PC emission band connected with defects in synthetic opal is determined by the type of infiltrates and the excitation wavelength. Possible mechanisms of the effects are discussed.
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