利用聚苯乙烯(polystyrene, PS)纳米球刻蚀结合水热生长的方法,制备周期有序δ-MnO_(2)纳米阵列。利用磁控溅射MnO_(2)靶材获得种子层,将PS纳米球通过自组装方法在MnO_(2)种子层上形成单层密堆积结构来制备图案化模板,再通过反应离子刻...利用聚苯乙烯(polystyrene, PS)纳米球刻蚀结合水热生长的方法,制备周期有序δ-MnO_(2)纳米阵列。利用磁控溅射MnO_(2)靶材获得种子层,将PS纳米球通过自组装方法在MnO_(2)种子层上形成单层密堆积结构来制备图案化模板,再通过反应离子刻蚀(reactive ion etching,RIE)减小PS纳米球的尺寸,并利用磁控溅射SiO_(2)靶材来覆盖PS纳米球间的间隙,去除衬底上的PS纳米球以得到周期有序的MnO_(2)种子位点,用于后续水热生长。通过选取不同尺寸的PS纳米球,制备周期分别为800和500 nm的有序纳米阵列,利用透射电子显微镜(transmission electron microscopy, TEM)对其进行表征,并确认阵列中MnO_(2)材料为δ相。研究结果为寻找低成本制备半导体材料有序纳米阵列提供了方法。展开更多
Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. I...Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. In this paper, we develop a kind of novel nanometer-sized fluorescent hybrid silica(NFHS) particles used as a sensitive and photostable fluorescent probe in biological staining and diagnostics. The NFHS particles are prepared by controlled hydrolysis of the fluorophore silica precursor using the reverse micelle technique. The fluorophores are dispersed homogeneously in the silica network of the NFHS particles and well protected from the environmental oxygen. In comparison with single organic fluorophores without incorporation, these nanoparticle probes are brighter, more stable against photobleaching and do not suffer from intermittent on/off light emission(blinking). The NFHS particles have also shown unique advantages over the existing common organic fluorophores, quantum dots, and latex-based fluorescent particles for biomolecule recognition in the following four major points: easy preparation, good photostability, high sensitivity, and low toxicity. The approach proposed in this article for making NFHS nanoparticles is a general one, and it is not restricted to a particular type of fluorophore molecule as selected in this study.展开更多
文摘利用聚苯乙烯(polystyrene, PS)纳米球刻蚀结合水热生长的方法,制备周期有序δ-MnO_(2)纳米阵列。利用磁控溅射MnO_(2)靶材获得种子层,将PS纳米球通过自组装方法在MnO_(2)种子层上形成单层密堆积结构来制备图案化模板,再通过反应离子刻蚀(reactive ion etching,RIE)减小PS纳米球的尺寸,并利用磁控溅射SiO_(2)靶材来覆盖PS纳米球间的间隙,去除衬底上的PS纳米球以得到周期有序的MnO_(2)种子位点,用于后续水热生长。通过选取不同尺寸的PS纳米球,制备周期分别为800和500 nm的有序纳米阵列,利用透射电子显微镜(transmission electron microscopy, TEM)对其进行表征,并确认阵列中MnO_(2)材料为δ相。研究结果为寻找低成本制备半导体材料有序纳米阵列提供了方法。
文摘Recent advances in the nanomaterials, such as luminescent quantum dots, latex fluorescent nanospheres and dye-doped silica nanoparticles, have opened a promising field toward the development of luminescent biolabel. In this paper, we develop a kind of novel nanometer-sized fluorescent hybrid silica(NFHS) particles used as a sensitive and photostable fluorescent probe in biological staining and diagnostics. The NFHS particles are prepared by controlled hydrolysis of the fluorophore silica precursor using the reverse micelle technique. The fluorophores are dispersed homogeneously in the silica network of the NFHS particles and well protected from the environmental oxygen. In comparison with single organic fluorophores without incorporation, these nanoparticle probes are brighter, more stable against photobleaching and do not suffer from intermittent on/off light emission(blinking). The NFHS particles have also shown unique advantages over the existing common organic fluorophores, quantum dots, and latex-based fluorescent particles for biomolecule recognition in the following four major points: easy preparation, good photostability, high sensitivity, and low toxicity. The approach proposed in this article for making NFHS nanoparticles is a general one, and it is not restricted to a particular type of fluorophore molecule as selected in this study.
