Griffith University researchers report breakthrough due to novel and multi-layer Colloidal Photonic Crystal structure
Griffith University scientists have made a remarkable breakthrough in the field of fluorescence enhancement via a discovery they believe could drive the next advances in sensor technology, energy saving and harvesting, lasers and optoelectronics.
A research team led by Dr Qin Li, from Griffith’s Queensland Micro- and Nanotechnology Centre, is reporting unparalleled magnitude of fluorescence enhancement due to a novel and multi-layer Colloidal Photonic Crystal (CPhC) structure.
According to Dr Li, the researchers discovered that a double heterostructure tri-layer CPhC – with the stopband of top and bottom layers overlapping the excitation wavelength, a middle CPhC layer in resonance with the emission wavelength, and a thickness supporting constructive multiple beam interference for excitation light — resulted in a thousand-fold fluorescence enhancement in an all-polymer structure compared to that achieved by the same amount of dyes on glass substrate.
“Furthermore, we found that the enhancement of fluorescence intensity due to the double heterostructure is almost six times that of monolithic CPhCs,” says Dr Li.
“What is even more intriguing is that the emission lifetime constant has been shortened by fourfold,” says Dr Li.
The findings are the culmination of two years of research involving teams from Australia and China, including world-leading scientists in nanochemistry and optics.
Their paper, Anomalous Fluorescence Enhancement from Double Heterostructure 3D Colloidal Photonic Crystals — A Multifunctional Fluorescence-Based Sensor Platform, is published in the journal Scientific Reports.
As well as demonstrating the potential for highly effective performance in ultra-sensitive sensing — with multiple functions including signal enhancement, ease in immobilisation and protection for sensing agents — the research paper presents evidence of significant improvements in energy efficiency and flexibility for lighting devices.
“By using our double heterostructure CPhCs, we can give LEDs a significant increase in energy efficiency and flexibility in colour tuning and colour mixing,” says Dr Li.
She adds that in fluorescence-based sensing technologies, improving signal to noise ratio is of paramount significance for improving sensitivity and reliability.
The enormous fluorescence enhancement demonstrated by double heterostructure CPhC will give a significant boost to push the limit.
There are also practical and economic benefits to the Griffith discovery.
“Colloidal photonic crystals can be conveniently made into array systems in mass production fashion, for example by inkjet printing method or by pintool plotter,” says Dr Li.
“Both materials and fabrication methods are inexpensive and scalable.”
The Latest on: Fluorescence enhancement
via Google News
The Latest on: Fluorescence enhancement
- Bifunctional Fluorescent/Raman Nanoprobe for the Early Detection of Amyloidon June 11, 2019 at 3:51 am
The peptide/probe interaction also induced a remarkable enhancement in the probes’ fluorescence emission. This fluorescence enhancement was further utilized to image amyloid plaques in the brain ... […]
- Plasmon-enhanced Fluorescence Spectroscopyon May 29, 2019 at 8:07 am
For example, an enhancement factor of 1340 times was achieved for the single molecule fluorescence of near- infrared dye N,N0-bis(2,6-diisopropyl phenol)-1,6,11,16-tetra-[4-(1,1,3,3-tetramethyl ... […]
- Initial state of DNA-Dye complex sets the stage for protein induced fluorescence modulationon May 8, 2019 at 2:03 am
Protein-induced fluorescence enhancement (PIFE) is a popular tool for characterizing protein-DNA interactions. PIFE has been explained by an increase in local viscosity due to the presence of the ... […]
- Plasmonic Patch Boosts Fluorescence for Biosensing, Bioimagingon December 6, 2018 at 4:00 pm
The plasmonic patch consistently resulted in a more than two orders of magnitude fluorescence intensity enhancement. The improvement in the bioanalytical parameters was found to be consistent across ... […]
- KARL STORZ Launches New 4 mm Endoscopic NIR/ICG Fluorescence Imaging System to Enhance Minimally Invasive Neurosurgeryon October 5, 2018 at 3:18 am
ICG enhancement of both the flap body and pedicle was associated ... Evaluation of Intranasal Flap Perfusion by Intraoperative ICG Fluorescence Angiography. Paper presented at: North American Skull ... […]
- Nanoparticles for Fluorescence-Enhanced Imaging and Therapy of Breast Canceron May 31, 2018 at 5:00 pm
Here, elongated gold (Au) NPs (nanobipyramids) with two sharp tips and tunable sizes/optical properties are expected to provide distinct advantages, including large fluorescence enhancement and ... […]
- Tunable photonic crystals-enhanced fluorescence by an assembly approach of polyelectrolyte interlayeron December 19, 2017 at 4:00 pm
The monolayer polyelectrolyte deposited on the PC surface can absorb more oppositely charged fluorophore molecules by an electrostatic interaction, resulting in an outstanding fluorescence enhancement ... […]
- Fluorescence-based Investigations of the Properties and Applications of Supramolecular Host-Guest Inclusion Systemson November 23, 2017 at 4:00 pm
In most cases in aqueous solution, host inclusion (for example by cyclodextrins) results in increased emission (fluorescence enhancement), but in rare cases, host inclusion can result in decreased ... […]
- A new generation of fluorescence-based water quality sensorson October 22, 2017 at 5:00 pm
The nanorods, 50nm wide and 158nm long, are designed to resonantly enhance fluorescence emission from a range of ... can bring significant sensitivity enhancement so that laboratory quality ... […]
- Crystallization-induced emission enhancement: A novel fluorescent Au-Ag bimetallic nanocluster with precise atomic structureon August 18, 2017 at 11:36 am
1 Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Anhui University, Hefei, Anhui 230601, P. R. China. 2 AnHui Province Key Laboratory of Chemistry for ... […]
via Bing News