A sensitive biosensor: strategy for the intracellular imaging of Cu2+ ions has been developed by integrating a recognition molecule, N-(2-aminoethyl)-N,N,N′tris(pyridin-2-ylmethyl)ethane-1,2-diamine (AE-TPEA), into hybrid system composed carbon and CdSe/ZnS quantum dots.

A carbon dot (C-Dot)-based two-photon fluorescent probe has been developed for the monitoring of pH changes across a broad range with high sensitivity and selectivity. The inorganic–organic also shows good biocompatibility cell permeability, thus can be successfully applied in bioimaging biosensing physiological living cells, as well tissues at depth 65–185 μm. Detailed facts importance to specialist readers are published ”Supporting Information”. Such documents peer-reviewed, but not...

An efficient strategy for selective fluorescent detection of Cu2+ was developed based on the carbon quantum dots (CQDs) nanoconjugated with a specific organic molecule, amino TPEA, and further applied to intracellular sensing imaging as consequence fluorescence properties established low cytotoxicity CQDs.

Determination of hydroxyl radical (•OH) with high sensitivity and accuracy in live cells is a challenge for evaluating the role that •OH plays physiological pathological processes. In this work, ratiometric fluorescence biosensor was developed, which gold nanocluster (AuNC) protected by bovine serum albumin employed as reference fluorophore organic molecule 2-[6-(4′-hydroxy)phenoxy-3H-xanthen-3-on-9-yl]benzoic acid (HPF) acted both response signal specific recognition element •OH. absence...

In this article, a ratiometric fluorescent biosensor for O2(•-) was developed, by employing carbon dots (C-Dots) as the reference fluorophore and hydroethidine (HE), specific organic molecule toward O2(•-), playing role both recognition element response signal. The hybrid probe CD-HE only emitted at 525 nm is ascribed to C-Dots, while HE almost nonfluorescent, upon excitation 488 nm. However, after reaction with new emission peak products of clearly observed 610 Meanwhile, gradually...

Seeing is believing: A direct, selective, and sensitive strategy for colorimetric visualization of cerebral dopamine has been developed the first time using gold nanoparticles through design double molecular recognition (see picture). The simplicity this method establishes a facile reliable approach monitoring species in brain chemistry, which may be related to physiological pathological events.

In this article, cupric oxide (CuO) leafletlike nanosheets have been synthesized by a facile, low-cost, and surfactant-free method, they further successfully developed for sensitive selective determination of hydrogen sulfide (H2S) with high recovery ability. The experimental results revealed that the sensitivity time present H2S gas sensor are strongly dependent on working temperature. best sensing performance has achieved low detection limit 2 ppb broad linear range from 30 to 1.2 ppm. is...

CuO hollow spheres with hierarchical pores, that is, quasi-micropores (1.0–2.2 nm), mesopores (5–30 and macropores (hollow cores, 2–4 μm), have been synthesized via a simple one-pot template-free method. The also show architecture, namely, the primary nanograins, quasi-single-crystal nanosheets assembled by composed of nanosheets. A mechanism involving an "oriented attachment" growth step followed "Ostwald ripening" process has proposed for structure pore formation typical spheres. With such...

Brain chemistry: A biosensor has been developed for in vivo determination of copper ions a rat brain by using gold truncated octahedral microcages. The significant analytical performance the present biosensor, as well properties carbon fiber microelectrode have provided direct and reliable approach monitoring cerebral metal (W.E.=working electrode; see picture).

Although separation of single-walled carbon nanotubes (SWCNTs) according to their helicity and handedness has been attracting tremendous interest recently, exploration the left- right-handed SWCNT enantiomers (defined as "M" "P") chiral sensing still remains in early stage. Here we presented a new electrochemical sensor for discrimination, which first time amplified selection on electrode surface based or semiconducting with (6,5)-enriched chirality. The enantioselectivity was demonstrated...

Everything's gone green: The selective oxidation of aromatic alcohols to aldehydes has been achieved by use a green energy source and solvent combination. Solar with recyclable Pt/TiO2 photocatalyst in water at ambient temperature brought about the desired high selectivity relatively long-term stability. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted authors....

A “turn-on” two-photon fluorescent sensor for H₂S is developed, in which C-Dot employed as a fluorophore and AE-TPEA–Cu²⁺complex first designed specific receptor H₂S.

A Au disk nanoelectrode down to 3 nm in radius was developed by a facile and reliable method successfully applied for monitoring dopamine release from single living vesicles. fine etched wire coated with cathodic electrophoretic paint followed polyimide, which retracted the tip end during curing expose nanotip. By cyclic voltammetric scanning above 0.5 M KCl, transformation of core-shaped apex into geometrically well-defined different dimensions can be controllably reproducibly achieved....

In this work, we develop a ratiometric two-photon fluorescent probe, ATD@QD-E2Zn2SOD (ATD = amino triphenylamine dendron, QD CdSe/ZnSe quantum dot, E2Zn2SOD Cu-free derivative of bovine liver copper–zinc superoxide dismutase), for imaging and sensing the changes intracellular Cu2+ level with clear red-to-yellow color change based on specific biomolecular recognition ion. The inorganic–organic nanohybrided probe features two independent emission peaks located at 515 nm ATD 650 QDs,...

Was geht in deinem Kopf vor? Eine direkte, selektive und empfindliche Strategie zur kolorimetrischen Visualisierung von zerebralem Dopamin beruht auf der Verwendung Goldnanopartikeln doppelter molekularer Erkennung (siehe Bild). Diese bietet einen einfachen zuverlässigen Ansatz Verfolgung Spezies im Gehirn, die mit physiologischen pathologischen Vorgängen zusammenhängen könnten. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents...

An efficient protocol for selective and sensitive detection of Cd(2+) was first developed based on photocurrents obtained at CdSe clusters which are in situ electrodeposited TiO(2) nanotubes with the gradual addition Cd(2+), theoretical technical simplicity, further successfully applied to an assay tap lake water samples.

Abstract In 2015, more than 30% of erasers were found to contain a PAE content that exceeded the 0.1% limit established by Quality and Technology Supervision Bureau Jiangsu Province in China. Thus, strengthening supervision regulation foods supplies, particular, remains necessary. Graphene oxide (GO) its composites have drawn great interests as promising adsorbents for polar nonpolar compounds. However, GO-based are typically restricted difficult separation after treatment because high...

Described here is that Au-C≡C bonds showed the highest stability under biological conditions, with abundant thiols, and best electrochemical performance compared to Au-S Au-Se bonds. The new finding was also confirmed by theorical calculations. Based on this finding, a specific molecule for recognition of Fe2+ designed synthesized, used create selective accurate sensor quantification . present ratiometric strategy demonstrates high spatial resolution real-time tracking in dynamic range...

Hydroxyl radical (•OH) is an essential reactive oxygen species involved in critical cell functions. However, the mechanisms controlling its subcellular localization and intracellular level during health disease remain poorly understood. This due to challenge of detecting •OH that are highly consequently short-lived (in vivo half-life ∼10–9 s). Herein, we present tungsten nanoelectrodes functionalized with stable 1-hexanethiol (HAT) for selective sensitive detection at via destruction...

Aiming at the construction of novel platforms with excellent performances in both circularly polarized photoluminescence (CP‐PL) and electrochemiluminescence (CP‐ECL), a new family pyrenophanes rigidly locked pyrene dimers varied bridges has been designed synthesized. Attributed to densely packed excimers, resultant revealed tunable bridge‐dependent emission behaviors, as investigated by femtosecond time‐resolved transient absorption spectroscopy. More importantly, all these planar chiral...

Aiming at the construction of novel platforms with excellent performances in both circularly polarized photoluminescence (CP‐PL) and electrochemiluminescence (CP‐ECL), a new family pyrenophanes rigidly locked pyrene dimers varied bridges has been designed synthesized. Attributed to densely packed excimers, resultant revealed tunable bridge‐dependent emission behaviors, as investigated by femtosecond time‐resolved transient absorption spectroscopy. More importantly, all these planar chiral...