Detection and identification of nanoplastics in water via plasmonic-based spectrometric methods using evaporation-driven colloidal assembly

Introduction

In recent years, we have discovered that our environment is extensively polluted with plastic particles in a wide range of sizes, from the largest pieces that we can identify with our bare eyes to the so-called microplastics (< 5 mm).

Detection of Microplastics

As a consequence of the improvement in detection techniques, we now know that, for example, up to trillions of microplastic particles per litre have been found in plastic bottles for infants and in general plastic-based consumer water containers.

Sampling Techniques

Plastic debris above the microplastic cut-off can be sampled easily (though tediously) using standard extraction, collection, and purification methods. However, microplastics are typically heavily underestimated when using such basic techniques.

Project Goals

In this project, I intend to develop a technique by which we can:

1. Concentrate diluted pre-filtered solutions by a controlled droplet evaporation process.
2. Perform chemical identification of its content beyond the current detection limits using surface enhanced Raman spectroscopy.

Implementation

The technique will be easy, fairly cheap to implement, and easily scalable for the identification of micro- and nanoplastics in consumer products.