期刊
BIOSENSORS & BIOELECTRONICS
卷 27, 期 1, 页码 101-105出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2011.06.023
关键词
Slot waveguide; Photonic crystal; Slotted photonic crystal; Optical biosensor; Microfluidic
类别
资金
- EPSRC [EP/I004602/1, EP/F020589/1]
- Engineering and Physical Sciences Research Council [EP/F020589/1, EP/I004602/1] Funding Source: researchfish
- EPSRC [EP/I004602/1, EP/F020589/1] Funding Source: UKRI
We demonstrate the detection of dissolved avidin concentrations as low as 15 nM or 1 mu g/ml using functionalized slotted photonic crystal cavities with integrated microfluidics. With a cavity sensing surface area of approximately 2.2 mu m(2), we are able to detect surface mass densities of order 60 pg/mm(2) corresponding to a bound mass of approximately 100 ag. The ultra-compact size of the sensors makes them attractive for lab-on-a-chip applications where high densities of independent sensing elements are desired within a small area. The high sensitivity over an extremely small area is due to the strong modal overlap with the analyte enabled by the slotted waveguide cavity geometry that we employ. This strong overlap results in larger shifts in the cavity peak wavelength when compared to competing approaches. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据