1 February 2019:
In a break-through in the field of nano membrane related research, CNBP alumni scientist Dr Peipei Jia and colleagues report on the development of large-area freestanding gold nanomembranes with nanohole arrays fabricated using a replication-releasing procedure. More information available below!
Journal: Materials Horizons.
Publication title: Large-area Freestanding Gold Nanomembranes with Nanoholes.
Authors: Peipei Jia, Kamil Zuber, Qiuquan Guo, Brant C. Gibson, Jun Yang and Heike Ebendorff-Heidepriem.
Abstract: Thin metal films with nanohole arrays have opened up new opportunities in applications ranging from plasmonics to optoelectronics. However, their dependence on substrates limits not only their performance but also other application possibilities. A key challenge to overcome this limitation is to make these nanostructured films substrate-free. Here we report large-area freestanding gold nanomembranes with nanohole arrays fabricated using a replication-releasing procedure. The structures maintain spatial uniformity and pristine quality after release across the entire membrane up to 75 cm2 in area and as thin as 50 nm. The freestanding nanomembranes show significantly enhanced optical transmission and effective field extension compared to the same nanomembranes on substrates. A plasmonic coupling resonance with a 2.7 nm linewidth achieves a record figure-of-merit of 240 for refractive index sensing. The gold nanomembranes can be geometrically converted to 3D microstructures by ion-irradiation-based kirigami technique. The transformed micro-objects can be precisely controlled via geometry design and strategic cutting. Furthermore, we find the presence of nanoholes can significantly change the in-plane modulus of the gold nanomembranes. Finally, the freestanding gold nanomembranes can be transferred to non-planar substrates, enabling their future integration with advanced optical and electronic systems for emerging applications.
10 August 2017:
After successfully receiving an ANN Overseas Travel Fellowship, CNBP researcher Dr Peipei Jia has arrived back at the University of Adelaide after a two month visit to the MRC Laboratory of Molecular Biology (LMB) in Cambridge, UK.
While there, Peipei had the opportunity to test both techniques and potential application for his work on the fabrication of large-area freestanding gold nanomembranes.
More specifically, tests undertaken while at Cambridge showed that the gold membrane had the size, quality and robustness for the critical application of resolving molecular structures in Cryo-electron microscopy (cryo-EM).
Work continues but the nanophotonics structure is expected to have significant impact on both structural biology and electron microscopy.
18 May 2017:
An ‘Institute for Photonics and Advanced Sensing’ (IPAS) pilot grant worth $6,000 has been awarded to CNBP researchers Dr Jingxian Yu (project lead – pictured left) and Dr Peipei Jia.
The grant will allow investigation into “double remote electrochemical addressing and optical readout of electrochemiluminescence at the nanopatterned tip of an optical fiber for the detection of biological species.”
The project has great potential to provide a versatile sensing platform for chemical sensing and medical diagnostics.
The proposed work will also bring chemists and physicists together to work in this trans-disciplinary area, with the possibility of promoting further collaborations between biological and medical scientists within IPAS and the CNBP.
10 August 2016:
The latest paper published by CNBP scientists demonstrates the quasiperiodic nanohole array based optical fiber as a high-performance plasmonic sensor.
Journal: ACS Sensors.
Publication title: Quasiperiodic Nanohole Arrays on Optical Fibers as Plasmonic Sensors: Fabrication and Sensitivity Determination.
Authors: Peipei Jia (pictured top left), Zhaoliang Yang, Jun Yang and Heike Ebendorff-Heidepriem.
Abstract: Surface plasmon resonance enhanced optical transmission has been observed in periodic nanohole arrays and plenty of plasmonic applications from label-free biosensing to surface-enhanced spectroscopies on various platforms have been found. Recently this effect has also been demonstrated for nanohole arrays with quasiperiodic patterns such as the Penrose tiling. Here we pattern and transfer quasiperiodic nanohole arrays onto optical fibers and investigate their optical performance in refractive index sensing. These quasiperiodic arrays show multiple resonances closely related to their geometric features. The resonances are narrow and sensitive to the dielectric changes on the probe surface due to our high quality fabrication. We find the measured sensitivity of our quasiperiodic nanohole arrays is as high as that of periodic nanohole arrays and reaches the theoretical sensitivity limit as predicted by our universal sensitivity analysis. This result in turn verifies our sensitivity theory on propagating surface plasmon resonance in a wider range beyond periodic nanostructure arrays. Our study demonstrates the quasiperiodic nanohole array based optical fiber is a high-performance plasmonic sensor.
The paper is available online.
31 Jul-4 Aug 2017:
CNBP Research Fellow, Dr Peipei Jia will visit Singapore and give an invited talk at a special workshop session (Lab-in-a-Fibre Technologies) at CLEO-PR, OECC and PGC 2017 which will be held at the Sands Expo and Convention Centre, 31 July-4 August 2017.
The conference combines the following three major international conferences, which widely covers the ‘Photonics’ field from devices to systems and networks.
• The 12th Conference on Lasers and Electro-Optics Pacific Rim(CLEO-PR 2017)
• The 22nd OptoElectronics and Communications Conference (OECC 2017)
• The 5th Photonics Global Conference 2017 (PGC 2017)
Dr Jia will talk about plasmonic fiber techniques including recent progress.
The title of his talk is ‘Plasmonic Optical Fiber Engineering: From Template Transfer to Nano imprint’.
7 February 2016:
CNBP researchers Peipei Jia (pictured), Philipp Reineck, Ivan Maksymov, Sabrina Heng and Daniel Stubing all attended the International Conference on Nanoscience and Nanotechnology (ICONN), in Canberra (7-11 February 2016).
Peipei Jia, CNBP Research Fellow, presented an invited talk on the topic ‘Large-area Gold Nanomembrane by Template Transfer with a Soluble Polymer’.
Philipp presented a poster on the nanoparticle comparison project, Daniel presented a poster titled “Reversible Ion Sensing With a Flip of a Switch”, while Ivan gave an oral talk on “Photoacoustic nanoantennae for intravascular imaging.”
Sabrina’s poster presentation was titled, “Microstructured Optical Fibers and Photoswitches: Light-Driven Sensors for Metal Ions.”
The event covered the areas of nanostructure growth, synthesis, fabrication, characterization, device design, theory, modeling, testing, applications, commercialisation, and health and safety aspects of nanotechnology.
Further information on the conference is available online.
7 February 2016:
Peipei Jia, CNBP Research Fellow, has attended the ‘International Conference on Nanoscience and Nanotechnology’ in Canberra, February 7th, 2016.
He presented an invited talk on the topic ‘Large-area Gold Nanomembrane by Template Transfer with a Soluble Polymer’.
Further conference and presenter information is available online.
9 July 2015:
CNBP researchers Roman Kostecki, Georgios Tsiminis , Mel McDowall, Peipei Jia, Erik Schartner and Tess Reynolds were happy to host a visiting Youth ANZAAS tour at their laboratories at the University of Adelaide on July 9th, 2015.
Youth ANZAAS (organised by the Australian and New Zealand Association for the Advancement of Science) is an annual residential international forum for science students in Years 10 to 12. Every year, students from each State and Territory are selected to participate in science activities and experiences over a period of a week.
These high achieving students with eager minds were excited to be shown around the working CNBP laboratories, and learnt more about the research that is being undertaken by the Centre, from the lectures that each researcher provided.
February 2015: Welcome:
CNBP Adelaide Node are pleased to welcome new CNBP Research Fellow commencing in January/February 2015.
- Jenny Butler who is joined the Recognise theme on January 28th
- Peipei Jia who joined the Measure and Illuminate theme on January 31st
- Xiaozhou (Michelle) Zhang who joined the Recognise theme on February 9
- John Horsley who joined the Recognise theme on February 9