PhD Studentship - Holographic Sensors

University of Birmingham - School of Chemical Engineering

Competition Funded PhD Project (Students Worldwide)

Application Deadline: Applications accepted all year round

Supervisor: A.K. Yetisen

Project Description

Holographic sensors are analytical devices that systematically diffract narrow-band light in the ultraviolet to near-infrared range for application in the detection and quantification of analytes and/or physical parameters. They can be functionalised with analyte-responsive materials to construct highly-sensitive optical sensors for use in testing, where a visual readout, fast turnaround time, and reversibility are needed. Holography allows fabrication of disposable sensors that are lightweight for miniaturization and multiplexing purposes. Holographic sensors offer three capabilities on a single analytical device: (i) label-free analyte-responsive polymer, (ii) real-time, reversible quantification of the external stimuli, and (iii) three-dimensional visual image display. Their potential applications range from in vitro diagnostics to optical security devices.

The aim of this project is to develop a nanofabrication method to produce holographic nanostructures in hydrogel films by combining laser interference lithography and silver halide chemistry in a cost-effective and rapid process. The Bragg stacks will consist of silver bromide nanocrystal multilayers. Upon broadband light illumination, the Bragg stacks diffract a narrow-band peak. To demonstrate the utility of this method, the Bragg stacks will be functionalised with analyte-sensitive molecules. The developed Bragg stacks may have application in portable, wearable, and implantable real-time medical diagnostics at point-of-care settings.

The successful student will form part of a multidisciplinary team and will be supervised by Dr. Ali K. Yetisen based in the Institute of Translational Medicine (www.itmbirmingham.co.uk) and the School of Chemical Engineering at the University of Birmingham.

Funding Notes

Students must have an undergraduate degree or master’s degree in engineering, chemistry, physics, materials science or a closely related subject.

University of Birmingham scholarships are available for exceptional UK/EU students. Self-funded international students are welcome to apply this post. Potential candidates should contact Dr. Ali K. Yetisen (a.k.yetisen@bham.ac.uk) and include a CV. Applications will be evaluated on an on-going basis until the position is filled.

References

Holographic Sensors: Three-Dimensional Analyte-Sensitive Nanostructures and their Applications. Chemical Reviews. 114 (20), 10654-10696 (2014)

Light-Directed Writing of Chemically Tunable Narrow-Band Holographic Sensors. Advanced Optical Materials, 2 (3), 250-254 (2014)

Mechanism of multiple grating formation in high-energy recording of holographic sensors. Applied Physics Letters. 105, 261106 (2014)0

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Type / Role:

PhD

Location(s):

Midlands of England