In this study, we demonstrated a flexible transparent three-dimensional (3D) ordered micro-hemisphere (MHS) array PDMS film with self-assembled Au nanoparticles (NPs) (an Au NP-MHS array film) as a surface-enhanced Raman scattering (SERS) platform for the in situ detection of pesticides in food.
A facile fabrication
strategy of transparent and upconversion photoluminescent
nylon 6 (PA6) nanofiber mats was developed based on PA6 nanofiber
mats, carboxylic acid-functionalized upconversion nanoparticles (UCNP-COOH),
and poly(methyl methacrylate) (PMMA) solution. UCNP-COOH were prepared
by a solvothermal method, followed by the ligand exchange process.
The electrospinning method and the spin-coating process were employed
to combine PA6 nanofiber mats with UCNP-COOH and PMMA to introduce
upconversion photoluminescent properties and transparency into the
nanocomposite mats, respectively. The prepared UCNP-COOH/PA6/PMMA
nanofiber mats are transparent and exhibit green emission, which are
similar to UCNP-COOH when they were excited under 980 nm laser. The
upconversion luminescent intensity of the functional nanofiber mats
can be tailored by adjusting the weight fraction of UCNP-COOH as fillers.
This facile strategy can be readily used to other types of intriguing
nanocomposites for diverse applications.
Ferroelectric ceramic materials with large and temperature-insensitive strain response are highly desired for the practical application of actuator in harsh environment conditions. In this work, a novel xBi(Mg1/2Zr1/2)O3-(0.55-x)PbZrO3-0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary...
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