Paul A. E. Piunno

A Comprehensive Build Your Own Instrument for Chemical Analysis Module for the Advanced Undergraduate Analytical Chemistry Laboratory

Paul A. E. Piunno, Samer Doughan

A persistent challenge in chemistry education is the reliance on commercial laboratory instrumentation and associated control and processing software without attention paid to learning the fundamental principles underlying instrument function and signal processing. To address this need for improved student learning of …

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Controls on the sinking of hymenopterans and orthopterans in water of varying salinity: a taphonomic study

Johnathan Sorrentino, Brandt M. Gibson, Corentin Jouault, S. Bruce Archibald et autres

Insect fossils are numerous and widespread across the Phanerozoic in various states of preservation that can include colour, fully articulated specimens, and three-dimensional preservation. Due to the naturally buoyant nature of most terrestrial insects, it is surprising that so many become fossilized …

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Efficient Dual Surface Modification of Cellulose Nanocrystals with Hydrophobic Moieties and Functional Polymers via a Grafting-to Approach

Richard Fuku, Yang Liu, Paolo Giuliana, Tianjia Yang et autres

Cellulose nanocrystals (CNCs) are promising nanomaterials for biomedical applications owing to their biocompatibility, low toxicity, and versatile surface chemistry. However, efficient surface modification of CNCs with hydrophobic moieties and functional polymers remains challenging under mild aqueous conditions. Herein, we present an aqueous-phase …

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Cellular Uptake of Upconversion Nanoparticles Based on Surface Polymer Coatings and Protein Corona

Karan Malhotra, Balmiki Kumar, Paul A. E. Piunno, Ulrich J. Krull

Upconversion nanoparticles (UCNPs) are materials that provide unique advantages for biomedical applications. There are constantly emerging customized UCNPs with varying compositions, coatings, and upconversion mechanisms. Cellular uptake is a key parameter for the biological application of UCNPs. Uptake experiments have yielded highly …

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A Science, Technology, Society, and Environmental Impact Assignment for Senior-Level Analytical Chemistry Students

Paul A. E. Piunno, Anna Shahmuradyan

A science, technology, society, and environmental (STSE) impact assignment framework was developed that bridges the gap between analytical chemistry education and broader societal and environmental contexts. Over the course of ∼8 weeks, students were provided with the opportunity to engage in a …

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Lanthanide-Doped Upconversion Nanoparticles: Exploring A Treasure Trove of NIR-Mediated Emerging Applications

Karan Malhotra, David A. Hrovat, Balmiki Kumar, Grace Yue Qu et autres

Lanthanide-doped upconversion nanoparticles (UCNPs) possess the remarkable ability to convert multiple near-infrared (NIR) photons into higher energy ultraviolet-visible (UV-vis) photons, making them a prime candidate for several advanced applications within the realm of nanotechnology. Compared to traditional organic fluorophores and quantum dots …

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PHYSICAL AND CHEMICAL CONTROLS ON THE SINKING AND DECAY OF INSECTS

Johnathan Sorrentino, Paul A. E. Piunno, Brandt M. Gibson, Marc Laflamme

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Unlocking Long-Term Stability of Upconversion Nanoparticles with Biocompatible Phosphonate-Based Polymer Coatings

Karan Malhotra, Richard Fuku, Balmiki Kumar, David A. Hrovat et autres

Achieving long-term (>3 months) colloidal stability of upconversion nanoparticles (UCNPs) in biologically relevant buffers has been a major challenge, which has severely limited practical implementation of UCNPs in bioimaging and nanomedicine applications. To address this challenge, nine unique copolymers formulations were prepared …

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Recent trends in the developments of analytical probes based on lanthanide-doped upconversion nanoparticles

Karan Malhotra, Richard Fuku, Justin Van Houten, Grace Yue Qu et autres

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Bisphosphonate Polymeric Ligands on Inorganic Nanoparticles

Karan Malhotra, Richard Fuku, Tsz Shan Chan, Nicole Kraljevic et autres

The design and synthesis of anchoring groups of bisphosphonate-amine (BP-NH 2 ) are presented for the preparation of polymeric ligands on luminescent nanoparticles (NPs). Such ligands serve as overcoatings to impart colloidal stability and conjugation chemistries. These ligands were placed on quantum …

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Teaching Research Best Practices through Early Career Experiential Learning

Paul A. E. Piunno, Michael deBraga, Troy A. Dexter, Marc Laflamme

Launching Your Research is a new course offering designed to engage undergraduate students in research at an early stage of their academic careers (sophomore–second year). This learning opportunity required students to identify research best practices and develop effective time, teamwork, and project …

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Fabrication and characterization of a microfluidic flow cytometer for the advanced undergraduate laboratory

Daniel J. Gorelik, Faiyza Alam, Joshua N. Milstein, Paul A. E. Piunno

Microfluidic devices can be used to explore a vast range of phenomena in biophysics and soft-matter physics. While the popularity of these devices is in part driven by the ease of soft-lithography, most research labs still depend upon expensive, clean-room fabrication of …

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