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Threefold growth efficiency improvement of silica nanosprings by using silica nanosprings as a substrate

机译：二氧化硅纳米型硅纳环作为基材的三倍增长效率改善

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摘要

The growth efficiency of one-dimension (1D) nanostructures via the vapor-liquid-solid process is commonly attributed to parameters such as precursor vapor pressure, substrate temperature, and the choice of the catalyst. The work presented herein is an investigation of the use of silica nanosprings (SNs) as a 3D substrate for improving the growth efficiency of SN themselves. SNs are a 1D nanomaterial that form a nonwoven structure with optimal geometric characteristics and surface properties that mitigate collisions between growing nanosprings and ripening of the gold catalyst, which should improve SN yield. Nanospring growth, for an eight hour period, on an SN coated surface relative to an equivalent flat substrate increased from approximate to 25 mgh(-1) to approximate to 80 mgh(-1), respectively. All things being equal, by splitting the typical amount of catalyst, in this case gold, between the first and second growth, the double growth procedure produced more than three times more nanosprings than the equivalent single growth of a SN. In addition, using an SN as a substrate increased the sustained growth condition from four to eight hours, and thus increased by a factor of ten the gravimetric yield of SNs relative to the mass of gold used.
机译：通过气相 - 固体工艺的一维（1D）纳米结构的生长效率通常归因于前体蒸气压，衬底温度和催化剂的选择。本文所呈现的作品是对使用二氧化硅纳米（SNS）作为3D基板的使用，以改善SN本身的生长效率。 SNS是1D纳米材料，形成非织造结构，具有最佳的几何特性和表面性质，这些特性和表面性质减轻了纳米型纳米环和金催化剂成熟之间的碰撞，这应该改善Sn产量。纳米间生长，在SN涂覆表面上相对于等效扁平基板的覆盖表面增加到25mgh（-1）的近似达到80mGH（-1）。通过分裂典型的催化剂量，在这种情况下，在这种情况下，在第一和第二生长之间，双生长程序产生的多个纳米产物比SN的等同单生长增加了三倍。另外，使用Sn作为基质的持续生长条件从4〜8小时增加，因此相对于所用金的质量增加，SN的重量率增加了10个因素。

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