当前位置: X-MOL 学术Adv. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Plant Nanobionic Sensors for Arsenic Detection
Advanced Materials ( IF 27.4 ) Pub Date : 2020-11-26 , DOI: 10.1002/adma.202005683
Tedrick Thomas Salim Lew 1 , Minkyung Park 1 , Jianqiao Cui 1 , Michael S Strano 1
Affiliation  

Arsenic is a highly toxic heavy‐metal pollutant which poses a significant health risk to humans and other ecosystems. In this work, the natural ability of wild‐type plants to pre‐concentrate and extract arsenic from the belowground environment is exploited to engineer plant nanobionic sensors for real‐time arsenic detection. Near‐infrared fluorescent nanosensors are specifically designed for sensitive and selective detection of arsenite. These optical nanosensors are embedded in plant tissues to non‐destructively access and monitor the internal dynamics of arsenic taken up by the plants via the roots. The integration of optical nanosensors with living plants enables the conversion of plants into self‐powered autosamplers of arsenic from their environment. Arsenite detection is demonstrated with three different plant species as nanobionic sensors. Based on an experimentally validated kinetic model, the nanobionic sensor could detect 0.6 and 0.2 ppb levels of arsenic after 7 and 14 days respectively by exploiting the natural ability of Pteris cretica ferns to hyperaccumulate and tolerate exceptionally high level of arsenic. The sensor readout could also be interfaced with portable electronics at a standoff distance, potentially enabling applications in environmental monitoring and agronomic research.

中文翻译:


用于砷检测的植物纳米仿生传感器



砷是一种剧毒重金属污染物,对人类和其他生态系统构成重大健康风险。在这项工作中,利用野生型植物从地下环境中预浓缩和提取砷的天然能力来设计用于实时砷检测的植物纳米仿生传感器。近红外荧光纳米传感器专为亚砷酸盐的灵敏和选择性检测而设计。这些光学纳米传感器嵌入植物组织中,可以非破坏性地获取和监测植物通过根部吸收的砷的内部动态。光学纳米传感器与活植物的集成使得植物能够转变为自供电自动采样器,从其环境中提取砷。使用三种不同的植物物种作为纳米仿生传感器演示了亚砷酸盐的检测。基于经过实验验证的动力学模型,纳米仿生传感器利用Pteris cretica ferns 超积累和耐受极高水平砷的天然能力,可在 7 天和 14 天后分别检测到 0.6 和 0.2 ppb 水平的砷。传感器读数还可以在一定距离内与便携式电子设备连接,从而有可能在环境监测和农艺研究中得到应用。
更新日期:2021-01-05
down
wechat
bug