Synthesis and characterization of Pd nanoparticles for plastic plasmonic sensing applications
Licentiatavhandling, 2019

It is well known that hydrogen mixed with air forms a highly flammable mixture. There is an urgent need for selective and accurate sensors, since hydrogen very often serves as a fuel or energy storage medium. Given the fact that even the smallest leak can lead to an explosion, it is very important for sensors to be reliable and safe, i.e. not ignite the gas themselves. Sensors with an optical read-out are under current interest, hence nanoparticles are examined towards this goal.

As a response to the above, this thesis discusses the synthesis of palladium nanoparticles with a standard surfactant as a stabilizer together with their characterization. Nanoforms of palladium are a perfect platform for hydrogen sensing, forming a hydride when exposed to hydrogen, making them very selective. However, there are compounds which strongly influence hydrogen sensing and often obscure the activity of palladium nanoparticles. Four common capping agents utilized in palladium nanoparticles synthesis were investigated to address this issue: hexadecyltrimethylammonium bromide (CTAB), hexadecyltrimethylammonium chloride (CTAC), tetraoctylammonium bromide (TOAB), polyvinylpyrrolidone (PVP).

Palladium nanoparticles were applied towards hydrogen sensing giving promising results. In order to achieve the goal to create a hydrogen sensor, nanoparticles were successfully incorporated into a poly(methyl methacrylate) (PMMA) polymer matrix. The created nanocomposite serves as a platform for two hydrogen sensing devices with plasmonic optical read-outs. On top of that it was found that among all four tested capping agents for palladium nanoparticles, PVP enhances hydrogen absorption kinetics whereas CTAB, CTAC and TOAB decrease absorption kinetics.

hydrogen sensing

nanoparticles

plasmon resonance

polymers

Hållö 8th floor Chemistry Department

Författare

Alicja Stolas

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Kasper Moth-Poulsen Group

Alicja Stolaś, Iwan Darmadi, Lucy Cusinato, Ferry A.A. Nugroho, Anders Hellman, Kasper Moth Poulsen, Christoph Langhammer. The Impact of Surfactants and Stabilizers on Palladium Nanoparticle Surface Catalized Reactions With Hydrogen

Nanoplasmonisk Sensing's Heliga Graal

Stiftelsen för Strategisk forskning (SSF), 2017-01-01 -- 2021-12-31.

Styrkeområden

Nanovetenskap och nanoteknik (2010-2017)

Ämneskategorier

Annan kemiteknik

Annan kemi

Organisk kemi

Utgivare

Chalmers tekniska högskola

Hållö 8th floor Chemistry Department

Mer information

Skapat

2019-05-16