Core-Shell SrCeO@SiO Filled COC-Based Composites with Low Dielectric Loss for High-Frequency Substrates.

High-frequency communication equipment urgently needs substrate materials with lower dielectric loss, better heat dissipation, and higher stability, to ensure real-time low-loss and high-speed signal transmission. The core-shell structure of SrCeO@SiO was prepared by the sol-gel method, and the modified powders with different volume contents were introduced into the cyclic olefin copolymer (COC) to prepare hydrocarbon resin-based composites. Due to the protective effect of the SiO shell, the stability of the powders is significantly improved, and the moisture barrier and corrosion resistance of the composites are enhanced, which is conducive to the normal operation of electronic equipment in harsh and complex environments.

Detection of Hg2+ based on the selective inhibition of peroxidase mimetic activity of BSA-Au clusters.

It was found that Hg(2+) can inhibit the peroxidase mimetic activity of bovine serum albumin (BSA) protected Au clusters (BSA-Au) due to the specific interaction between Hg(2+) and Au(+) existed onto the surface of BSA-Au clusters. By coupling with 3, 3', 5, 5'-tetramethylbenzidine (TMB)-H2O2 chromogenic reaction, a novel method for Hg(2+) detection was developed based on the inhibiting effect of Hg(2+) on BSA-Au clusters peroxidase-like activity. This method exhibited high selectivity and sensitivity.

Visual detection of prion protein based on color complementarity principle.

Two complementary colors mixed in a proper proportion will produce a neutral color in the color theory. A novel colorimetric method on basis of the color complementarity principle has been well-established to detect recombinant prion protein (rPrP). We found that a colorless solution appeared after mixing orange CdTe quantum dots (QDs) with green-blue malachite green (MG) because of color complementarity.

Gold nanoparticles as a probe for prion determination via resonance light scattering method.

Dihydrolipoic acid (DHLA) modified gold nanoparticles (AuNPs) were used as a highly selective probe for the detection of prion proteins. We discovered that AuNPs undergo aggregation selectively in the presence of recombinant prion protein (rPrP), and such selective aggregation enhanced the resonance light scattering (RLS) intensity from AuNPs tremendously. Based on this phenomenon, we established a new assay for rPrP detection.

Gold nanoparticles as a label-free probe for the detection of amyloidogenic protein.

Because amyloidogenic proteins, such as prion protein, β-amyloid peptide and α-synuclein, are associated with a variety of diseases, methods for their detection are important. Recombinant prion protein (rPrP) can selectively induce aggregation of dihydrolipoic acid capped gold nanoparticles (DHLA-AuNPs), which reduces the absorbance of the DHLA-AuNPs and changes their color from red to blue. These changes were used for label-free qualitative and quantitative detection of amyloidogenic protein.

Enhancing the luminescence of carbon dots with a reduction pathway.

Blue luminescent reduced state carbon dots were prepared by reducing carbon dots with NaBH(4). The quantum yield of the reduced state carbon dots increased from 2% to 24% and the maximum emission wavelength shifted from 520 to 450 nm. This offers a simple pathway to enhance the luminescence of carbon dots.

Carbon nanodots as peroxidase mimetics and their applications to glucose detection.

Carbon nanodots (C-Dots) were found to possess intrinsic peroxidase-like activity, and could catalytically oxidize 3,3',5,5'-tetramethylbenzidine (TMB) by H(2)O(2) to produce a colour reaction. This offers a simple, sensitive and selective colorimetric method for glucose determination in serum.