Three-dimensional porous SERS powder for sensitive liquid and gas detections fabricated by engineering dense "hot spots" on silica aerogel.
Three-dimensional porous SERS powder for sensitive liquid and gas detections fabricated by engineering dense "hot spots" on silica aerogel.
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通过在二氧化硅气凝胶上设计致密“热点”而制造出用于敏感液体和气体检测的三维多孔 SERS 粉末
DOI：
10.1039/d0na00849d
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发表时间：
2021-02-23
影响因子：
4.7
通讯作者：
中科院分区：
文献类型：
--
作者：
研制了一种三维多孔Sers粉体材料--银纳米颗粒-硅气凝胶。利用原位化学还原策略，Ag纳米颗粒在多孔气凝胶结构上密集组装，从而形成具有固有的大比表面积和高孔隙率的三维“热点”分布。这些特征可以有效地富集金属表面上的分析物，并提供巨大的近场增强。不仅对常规的液体分析物，而且对气体也实现了高灵敏度和均匀的Sers检测，增强因子高达108，相对标准偏差为13%。从Sers数据中获得了稳健的校准曲线，这表明了定量分析的潜力。此外，该粉末显示出比常规Ag纳米结构更出色的Sers稳定性，这使得长期储存和方便使用成为可能。凭借所有这些优点，多孔Sers粉末材料可以扩展到现场Sers“鼻子”应用，例如用于化学分析，环境监测和反恐的液体和气体检测。
A three-dimensional porous SERS powder material, Ag nanoparticles-engineered-silica aerogel, was developed. Utilizing an in situ chemical reduction strategy, Ag nanoparticles were densely assembled on porous aerogel structures, thus forming three-dimensional “hot spots” distribution with intrinsic large specific surface area and high porosity. These features can effectively enrich the analytes on the metal surface and provide huge near field enhancement. Highly sensitive and homogeneous SERS detections were achieved not only on the conventional liquid analytes but also on gas with the enhancement factor up to ∼108 and relative standard deviation as small as ∼13%. Robust calibration curves were obtained from the SERS data, which demonstrates the potential for the quantification analysis. Moreover, the powder shows extraordinary SERS stability than the conventional Ag nanostructures, which makes long term storage and convenient usage feasible. With all of these advantages, the porous SERS powder material can be extended to on-site SERS “nose” applications such as liquid and gas detections for chemical analysis, environmental monitoring, and anti-terrorism.
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影响因子：
7
作者：
Hamon C;Novikov SM;Scarabelli L;Solís DM;Altantzis T;Bals S;Taboada JM;Obelleiro F;Liz-Marzán LM
通讯作者：
Liz-Marzán LM
影响因子：
3.4
作者：
Lafuente M;Berenschot EJW;Tiggelaar RM;Mallada R;Tas NR;Pina MP
通讯作者：
Pina MP
影响因子：
41.2
作者：
Lim, Dong-Kwon;Jeon, Ki-Seok;Suh, Yung Doug
通讯作者：
Suh, Yung Doug
具有定制表面形貌的金介观结构及其用于表面增强拉曼光谱的自组装阵列
影响因子：
10.8
作者：
Fang, Jixiang;Du, Shuya;Hahn, Horst
通讯作者：
Hahn, Horst
影响因子：
15
作者：
Chen, Hung-Ying;Lin, Meng-Hsien;Gwo, Shangjr
通讯作者：
Gwo, Shangjr