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Protection of Platinum Catalyst Micro-Scale driven Autonomous Swimmers in the Medium of Human Serum1:30 PM 17/11/2016 Pam Liversidge Building F12Presented By Jacob Humphries 4th Year MEng Candidate Supervisor: Dr Stephen Ebbens

1Hello and welcome to my Research Project Presentation,

17/11/2016 The University of Sheffield2

IntroductionThe ProblemObjective AimsScientificApproachSignificanceof the Project

ConclusionContents

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What are Autonomous Swimmers?

17/11/2016 The University of Sheffield3Micron to Nano-Scale devices for small scale transport problems.

AuPt

MotorPt

Autonomous as Notably similar devices have been made to transport via external means such as magnetic fields. There are many different types. Those that move Via phoresis I.e. which is kind of a self electrolysis where net movement of protons creates movement. Biological versions, where a flagella of a spermatozoa was grafted onto the back of molecule, and Finally the type of Autonomous swimmer I will be working with in my project, those driven by a fuel. heir movement as of yet is not very directed but attempts have been made using fuel concentration gradients. i.e by placing a stronger concentration in one area than an other area

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17/11/2016 The University of Sheffield4

PtPtPt2H2O22H2O2O2O2O22H2O2H2OPeroxide Fuelled Swimmers

2H2O2H2O2Ebbens, S, 2016, pers. comm.

This Video shows a 4

The Problem17/11/2016 The University of Sheffield5PtPolystyrene

MixtureVelocity (m s-1)3% H20218003% H202 +10% Human Serum76

Ebbens, S, 2016, pers. comm.

The problem I will be addressing will be addressing is 5

17/11/2016 The University of Sheffield6Objective Aims of my ProjectAnalyse the effectiveness of porous coatings such as silica in protecting the platinum catalyst.By varying coating thickness, peroxide concentrations and exploring alternative coating

6Analyse the effectiveness of Silica in protecting the catalyst and ensuring reaction in serum

17/11/2016 The University of Sheffield7Scientific Approach

PtPolystyrene

H2O2

H2O2H2OO2

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17/11/2016 The University of Sheffield8The Real World Significance of the Project

MicrofluidicsMicron-scale fluid pumps

Lab on a Chip outside the body

Restrepo-Perez, L. R., 2014. Trappiing self-propelled micromotors with microfabricated chevron and heart shaped chips. Royal Society Of Chemistry, 14, 1515-1518.

8Uses less reagents and sample, low environmental footprint.

ConclusionAutonomous SwimmersProtection of Platinum using SilicaTrying to use in Human SerumMicrofluidics/ Lab on a chip17/11/2016 The University of Sheffield9

To DiscoverAndUnderstand.

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