Materials Science

15 open-access papers in Materials Science, free to watch.

3:52

Comparative Study of Field-Effect Transistors Based on Graphene Oxide and CVD Graphene in Highly Sensitive NT-proBNP Aptasensors

Anastasiia Kudriavtseva, Stefan Jarić, Nikita Nekrasov, А. В. Орлов, Ivana Gadjanski, Ivan Bobrinetskiy, Petr I. Nikitin, Nikola Ž. Knežević

Could a saliva sample reveal signs of heart failure without a blood draw? This study found that a less perfect form of graphene could detect the signal more reliably than the cleaner, more orderly version. Two graphene-based sensors cost about the same, but they do not perform the same: the rougher, more defective material detects NT-proBNP in artificial saliva at a lower concentration than pristine CVD graphene.

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4:54

Thermal Stability and Flame Retardancy of Rigid Polyurethane Foam Composites Filled with Phase-Change Microcapsule

Qing Cao, Qing Cao, Q. Cao, Q. Cao, Lujie Zhou, Kai Yu

Rigid polyurethane foam is useful in cars, buildings, mining and aerospace, but it burns easily, releases toxic gases, and can trap enough heat to help start a fire. This study asks whether the same material can be made to absorb heat and slow flames. What if a material added to polyurethane foam for heat storage could also slow a fire? This study puts paraffin inside chitosan-based microcapsules and tests whether the capsules make rigid foam both thermally functional and more flame resistant.

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4:10

Synthesis of L-Ornithine- and L-Glutamine-Linked PLGAs as Biodegradable Polymers

Gülce Taşkor Önel

A familiar medical plastic can be redesigned with parts borrowed from the human body, and that small change makes it become friendlier to water and break down faster. The surprising part is how useful that controlled breakdown could be. What happens when a standard biodegradable polymer is linked to amino acids that help transport nitrogen in the human body? This study shows how L-ornithine and L-glutamine change PLGA’s chemistry, thermal behavior, surface properties, and degradation.

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