Cicely Rathmell


In Situ Enhancement of Microplastic Raman Signals in Water Using Ultrasonic Capture

June 01, 2020

Of the 78 million tons of plastic packaging manufactured every year, approximately one-third ends up in the ocean, the air, and most foods and beverages. To monitor the proliferation of these plastics, an ultrasonic capture method is demonstrated that produces a 1500-fold enhancement of Raman signals of microplastics in water.

Rapid, Portable Pathogen Detection with Multiplexed SERS-based Nanosensors

June 01, 2019

A new application of surface-enhanced Raman spectroscopy (SERS) is described for quantifying low concentrations of pathogens with high reproducibility. In this novel assay, bacteria are captured and isolated using functionalized metal nanoparticles for rapid optical identification via SERS. Initial tests with a portable SERS system validated the ability to identify the presence of Escherichia coli and methicillin-resistant Staphylococcus aureus bacteria.

Stray Light in Absorbance Measurements

September 13, 2016

In this technical note we discuss the causes and consequences of stray light, and provide suggestions for mitigating its effects in your experimental setup.