.png){kind=icon}
.png){kind=icon}
Return
Optical Force Sensor Based on Plasmon Modulated Upconversion Luminescence
.png){kind=icon}
PRE
AI
DOI：10.1002/adom.202400393.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
A novel force sensor exploiting the interaction between plasmonic nanostructures and upconversion nanoparticles (UCNPs) is reported. The nanosensor is composed of a gold nanodisk and UCNPs separated by a flexible polymer layer. The gold nanodisk is designed to exhibit a plasmon resonance that selectively enhances one of the emission bands of the UCNPs while leaving the other ones largely unaffected. As the nanosensor is compressed or stretched by an external force, the polymer layer thickness changes, modulating the plasmon-UCNP coupling. The resulting changes in the luminescence intensity provide the basis for sensing. Furthermore, the nanosensor employs ratiometric sensing, which makes it highly robust against any environmental variations. The nanosensors exhibit two orders of magnitude higher responsivity than previously reported UCNP-based force sensors. They can be prepared as an on-chip sensor array or in a colloidal solution, making them suitable for a variety of applications in biology and robotics. This article presents the first Purcell enhancement-based upconverting nanoparticle (UCNP) force sensor. Thanks to this novel approach, the sensor is capable of producing up to two orders of magnitude better responsivity to pressures than other UCNP-based force sensors, and detect forces as small as 80 nN. The article also discusses in depth its modeling, fabrication, and characterization. image
Keywords:
force sensing
plasmon
upconversion luminescence
Journal
IF:
7.2
Papers:
8.7K
Citations:
4.6W
