| 1. |
- Khaliliazar, Shirin, et al.
(author)
-
Electrochemical Detection of Genomic DNA Utilizing Recombinase Polymerase Amplification and Stem-Loop Probe
- 2020
-
In: ACS Omega. - : AMER CHEMICAL SOC. - 2470-1343. ; 5:21, s. 12103-12109
-
Journal article (peer-reviewed)abstract
- Nucleic acid tests integrated into digital point-of-care (POC) diagnostic systems have great potential for the future of health care. However, current methods of DNA amplification and detection require bulky and expensive equipment, many steps, and long process times, which complicate their integration into POC devices. We have combined an isothermal DNA amplification method, recombinase polymerase amplification, with an electrochemical stem-loop (S-L) probe DNA detection technique. By combining these methods, we have created a system that is able to specifically amplify and detect as few as 10 copies/mu L Staphylococcus epidermidis DNA with a total time to result of 70-75 min.
|
|
| 2. |
- Wang, Zhen, et al.
(author)
-
Dual-Tunable Structural Colors from Liquid-Infused Aerogels
- 2020
-
In: Advanced Optical Materials. - : Wiley. - 2162-7568 .- 2195-1071. ; 8:7
-
Journal article (peer-reviewed)abstract
- Herein, dual-tunable structural colors generated from liquid-infused, robust silsesquioxane aerogels due to the specific light scattering by the aerogel skeleton in liquids with matching refractive indices, are reported. The colors are tunable by changing the temperature and the composition of the liquid that roots from the coherence between the colors and the refractive index of the infused liquid. The finding provides new insights and tools for constructing structural colors and light management. It also opens applications of stimuli-responsive smart windows, displays, and sensors. Taking advantage of the penetrable light of selected wavelength, the 3D structures of aerogel skeletons are reconstructed by an optical method, which provides a facile alternative approach to characterizing aerogel structure and will be instrumental to the understanding of the relationship between skeleton structure and mechanical property of porous 3D structures.
|
|
| 3. |
- Wanzhu, Cai, et al.
(author)
-
Dedoping-induced interfacial instability of poly(ethylene imine)s-treated PEDOT:PSS as a low-work-function electrode
- 2020
-
In: Journal of Materials Chemistry C. - : ROYAL SOC CHEMISTRY. - 2050-7526 .- 2050-7534. ; 8:1, s. 328-336
-
Journal article (peer-reviewed)abstract
- Transparent organic electrodes printed from high-conductivity PEDOT:PSS have become essential for upscaling all-carbon based, low-cost optoelectronic devices. In the printing process, low-work-function PEDOT:PSS electrodes (cathode) are achieved by coating an ultra-thin, non-conjugated polyelectrolyte that is rich in amine groups, such as poly(ethylene imine) (PEI) or its ethoxylated derivative (PEIE), onto PEDOT:PSS surfaces. Here, we mapped the physical and chemical processes that occur at the interface between thin PEIx (indicating either PEI or PEIE) and PEDOT:PSS during printing. We identify that there is a dedoping effect of PEDOT induced by the PEIx. Using infrared spectroscopy, we found that the amine-rich PEIx can form chemical bonds with the dopant, PSS. At lower PSS concentration, PEIx also shows an electron-transfer effect to the charged PEDOT chain. These interface reactions lock the surface morphology of PEDOT:PSS, preventing the redistribution of PSS, and reduce the work function. Subsequent exposure to oxygen during the device fabrication process, on the other hand, can result in redoping of the low-work-function PEDOT:PSS interface, causing problems for printing reproducible devices under ambient conditions.
|
|
