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
- Noninvasive monitoring of hepatic glutathione depletion through fluorescence imaging and blood testingon February 19, 2021 at 3:55 pm
However, once the ICG-GS was displaced from the Au25 surface by free GSH, the NIR fluorescence of ICG was instantaneously recovered, resulting in over 100-fold enhancement in the NIR emission (fig. S2 ...
- Self-assembly induced luminescence of Eu3+-complexes for bioimaging applicationon February 16, 2021 at 4:00 pm
This will greatly limits the intramolecular rotation or vibration of Eu 3+-complexes, thus resulting in the enhancement of ... and HClO by steady-state fluorescence and time-resolved assay.
- Addressable nanoantennas with cleared hotspots for single-molecule detection on a portable smartphone microscopeon February 11, 2021 at 2:37 am
2f). Self-assembled nanoantennas with a cleared and addressable hotspot represent an inexpensive and versatile platform for fluorescence signal enhancement assays. Single fluorescent molecules ...
- Curadel Surgical Innovations (CSI) Moves Flagship Contrast Agent for Image-guided Surgery, ZW800-1, Towards Commercializationon February 4, 2021 at 12:00 pm
Curadel Surgical Innovations Inc., a privately held company specializing in the development of near-infrared fluorescent contrast agents for image-gui ...
- Fluorescent metal organic frameworks go dark to detect explosiveson February 4, 2021 at 6:44 am
The fluorescent light signal turns on when the molecule is present ... Structure-Driven Photoluminescence Enhancement in a Zn-Based Metal-Organic Framework. Chem. Mater. 31, 7933 (2019). [DOI: 10.1021 ...
- Fluorescence enhancement with DNA origami nanoantennas and further DNA molecular deviceson January 29, 2021 at 1:32 am
To improve the sensitivity of DNA detection assays, we created DNA origami optical antennas for metal enhanced fluorescence. We first discuss the influence of the metal nanostructure on the ...
- Optics and photonics enable the fight against COVID-19on January 27, 2021 at 7:00 am
The role of fluorescence in COVID-19 testing For diagnosing active ... (Courtesy of Affinité Instruments) Surface-enhanced Raman spectroscopy (SERS), which is an enhancement technique based on the ...
via Bing News