Despite a significant surge in the number of investigations into both optically active Au and Ag nanostructures, there is currently only limited knowledge about Cu nanoclusters (CuNCs) their potential applications. Here, we have succeeded preparing pair red-emitting CuNCs on basis complexation redox reaction between copper(II) penicillamine (Pen) enantiomers, which Pen serves as reducing agent stabilizing ligand. Significantly, feature unique aggregation induced emission (AIE)...

Despite a significant surge in the number of investigations into chirality at nanoscale, especially thiolated chiral molecules capping gold clusters, only limited knowledge is currently available to elaborate alloying effect on chiroptical behavior bimetallic nanoparticles (NPs). Also, few successful cases as efforts toward development chirality-dependent applications optically active nanomaterial have been made. Herein, positive test case for alloy nanoparticle synthesis, stable and large...

Pressure measurements are performed everyday with simple devices, and in the field of analytical chemistry pressure-based signaling strategy offers two important advantages, signal amplification particular applicability point-of-care settings. Herein, by using vancomycin (Van)-functionalized platinum nanoparticles (PtNPs@Van) aptamer-coated magnetic CuFe2O4 nanoprobes dual-recognition units integrated a catalyzed breakdown H2O2 for O2 generation, we demonstrated that gas pressure can be used...

A pair of optically active carbon dots were prepared, which could specifically target and directly illuminate the Golgi apparatus.

A nanosensor was established to discriminate glutathione (GSH) from other competitive biothiols based on a photoluminescence (PL) “switch-on” signal readout.

Using microtitration method, the relationship between Phenoloxidase activity and resistance of diamondback moth Plutella xylostella (Linnaeus) to novel insecticide butane-fipronil was determined in vitro. After selection tenth-generation by butane-fipronil, fourth instar larvae increased 83.80-fold as compared susceptible strain. resistant strain (PO(r)) 1.29-fold higher than one (PO(s)). However, Km optimum pH values were similar strains, which 1.11 mM 6.5, respectively. Both PO(r) PO(s)...

Iodide, as a biologically important anion, it remains worthwhile yet challenging undertaking to find sensitive and specific approach provide technically simple iodide detection. In this article, was found that no other ions than iodide-induced anisotropic growth of gold nanocrystals (AuNCs) originated from small molecule, histidine-mediated synthesis AuNCs, were observed. Simultaneously, is accompanied by the fluorescence quenching AuNCs naked-eye visible color change. Therefore, new...

Strongly emitting chiral AuNCs are prepared and the origins of optical activity discussed from viewpoint intrinsically core model dissymmetric field effect.

A two-step pyrolytic route has been demonstrated for producing optically active photoluminescence CQDs by surface passivation with an enantiomeric ligand.

A facile visualization method for the tetracycline antibiotics (TCs) detection was developed not only in laboratory but also a point-of-care setting using Ag + /Tb 3+ @UiO-66-(COOH) 2 as an optical probe.

Inspired by the knowledge that chiroptical activity of Cu and Ag nanoclusters (NCs) is generally about several-fold larger than corresponding Au NCs but poor stability alloy metal particles often demonstrate unique stability, in this contribution synthesis chiral Au–Cu was attempted via reduction varying mole fractions precursors sodium borohydride presence d-/l-penicillamine (d-/l-Pen), to gain insights into alloying effect on activity. As a result, g factors ∼0.57 × 10–3, obviously pure...

Very close structure and property similarities among biothiols, such as glutathione (GSH), cysteine (Cys), homocysteine (Hcy), present a major challenge to achieve their discriminative detection. In this contribution, nanomaterial surface energy transfer (NSET) system was established discriminate GSH from Cys Hcy with the photoluminescence (PL) "switch-on" response. The nanosensor constructed using nitrogen sulphur co-doped carbon dots (N,S-CDs) silver nanoparticles (AgNPs) through...

The local environments within an amphiphilic polymer shell wrapped around lanthanide-doped upconverting nanoparticles were probed using steady-state and time-resolved fluorescence spectroscopy techniques. Emission lifetime measurements of pyrene chromophores trapped the reveal that there are at least two environments, where organic molecules encapsulated in hydrophobic have lower polarity than water. migration from their initial location to another was also observed, demonstrating polymeric...

Here we report a simple colorimetric method for the detection of adenosine triphosphate disodium (ATP) using unmodified gold nanoparticles (AuNPs) as an optical probe. In acidic media, melamine can link neighboring AuNPs and result in formation nanoparticle aggregates. Simultaneously, color solution changes from red to blue. However, upon addition ATP, responsive disassembly aggregates occurs, due competitive adsorption between ATP molecules on surface AuNPs. Consequently, aggregated are...

Based on target-responsive aggregation occurrence of Au@PtNPs, a dual-mode strategy<italic>via</italic>gas pressure and colorimetric signal readout was established for the detection spermine, not only in laboratory but also point-of-care setting.

Using the as-prepared water-stable and highly luminescent rod-like Tb–BTC metal–organic frameworks as an optical probe, a luminescence turn-off strategy has been developed for detection of OLA in animal feed edible tissues.

A strategy for membrane pore-forming protein assay and inhibitor screening was developed with the combination of TAPP-loaded liposomes GO sheets.

In this paper, carboxyl-carbon dots (CDs) were prepared and used to construct a composite fluorescent probe of CDs-aluminum(III) based on coordination between carboxy groups aluminum(III).The was quantitatively detect fluoride ions (F  ) in environmental samples by exploiting the competition F CDs for Al 3+ .It found that coordinated with carboxylate surface CDs, inducing aggregation fluorescence quenching.F coordinates more strongly than which causes dissociate, allowing recovery...

Due to the high hardness of SiC ceramics, wear arc-shaped metal bonded diamond wheels is very serious during grinding process large-aperture aspheric mirrors. The surface accuracy and surface/sub-surface quality mirror will be affected seriously if wheel not timely dressed. Therefore, this paper focus on in-process dressing wheels. In paper, application asymmetric arc profile in mirrors discussed first. Then a rotating cup-shaped electrode electro discharge device for developed based...

The resonance light scattering(RLS) spectra of the interaction Quinine dihydrochloride (Quinine)with perfluorooctane sulfonate (PFOS) was investigated. A RLS method for determination PFOS has been established. In pH 2.87 Britton-Robinson (BR) buffer solution, anions can react with protonated by electrostatic forces and hydrophobic interactions to form 2:1 ion-association complexes resulting in greatly enhanced scattering signals characterized a peak at 283 nm, intensity proportional...