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DEVICE AND METHOD FOR NANOPARTICLE SIZING BASED ON TIME-RESOLVED ON-CHIP MICROSCOPY
DEVICE AND METHOD FOR NANOPARTICLE SIZING BASED ON TIME-RESOLVED ON-CHIP MICROSCOPY
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机译:基于时间分辨片上显微技术的纳米颗粒尺寸测定的装置和方法
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摘要
A method for the label-free sizing of small, nanometer-sized objects such as particles includes a hand-held, portable holographic microscope that incorporates vapor condensation of nanolenses and time-resolved lens-free imaging. The portable device is used to generate reconstructed, time-resolved, and automatically-focused phase images of the sample field-of-view. The peak phase value for each object a function of working distance (z2) and condensation time (t) is used to measure object size. The sizing accuracy has been quantified in both monodisperse and heterogeneous particle solutions, achieving an accuracy of +/−11 nm for particles that range from 40 nm up to 500 nm. For larger particles, the technique still works while the accuracy roughly scales with particle size.
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