Self-Assembly of Plasmonic Near-Perfect Absorbers of Light: The Effect of Particle Size
Gus O Bonin, Steven J Barrow, Timothy U Connell, Ann Roberts, Anthony SR Chesman, Daniel E Gomez
The Journal of Physical Chemistry Letters | AMER CHEMICAL SOC | Published : 2020
Structures capable of perfect light absorption promise technological advancements in varied applications, including sensing, optoelectronics, and photocatalysis. While it is possible to realize such structures by placing a monolayer of metal nanostructures above a reflecting surface, there remains limited studies on what effect particle size plays on their capacity to absorb light. Here, we fabricate near-perfect absorbers using colloidal Au nanoparticles, via their electrostatic self-assembly on a TiO2 film supported by a gold mirror. This method enables the control of interparticle spacing, thus minimizing reflection to achieve optimal absorption. Slightly altering the nanoparticle size in..View full abstract
Awarded by ARC
We acknowledge the efforts of William Durkacz for their continued assistance and direction with the 3D art associated with this work. We acknowledge Michael Wilms for insightful discussion. This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). This work was performed in part at the RMIT Micro Nano Research Facility (MNRF) in the Victorian Node of the Australian National Fabrication Facility (ANFF). The authors acknowledge the facilities and the scientific and technical assistance of the RMIT Microscopy & Microanalysis Research Facility at RMIT University. S.J.B. thanks RMIT University for support through a Vice-Chancellor's Postdoctoral Fellowship. D.E.G. acknowledges the ARC for support (FT140100514). A.R. acknowledges the ARC for support (DP160100983).