Ferromagnetic Mn5Ge3 thin films were grown on Ge(111) with solid-phase epitaxy. The epitaxial relationship between the alloy film and substrate is Mn5Ge3(001)//Ge(111) with [100]Mn5Ge3//[11̄0]Ge. The alloy films exhibit metallic conductivity and strong ferromagnetism up to the Curie temperature, TC=296 K. These epitaxial alloy films are promising candidates for germanium-based spintronics.

This review summarized recent advances in CDs-based bioimaging including in vitro imaging in delivering CDs into different types of cells and in vivo applications in distribution and uptake of CDs, imaging-guild drug delivery and tumor therapeutics.

Dual-atom site catalysts (DACs) have emerged as an ew frontier in heterogeneous catalysis because the synergistic effect between adjacent metal atoms can promote their catalytic activity while maintaining the advantages of singleatom site catalysts (SACs), like 100 %a tomic utilization efficiency and excellent selectivity.H erein, as upported Pd 2 DACw as synthesized and used for electrochemical CO 2 reduction reaction (CO 2 RR) for the first time.The as-obtained Pd 2 DACe xhibited superior CO 2 RR catalytic performance with 98.2 %C Of aradic efficiency at À0.85 Vv s. RHE, far exceeding that of Pd 1 SAC, and coupled with long-term stability.T he density functional theory (DFT) calculations revealed that the intrinsic reason for the superior activity of Pd 2 DACt owardC O 2 RR was the electron transfer between Pd atoms at the dimeric Pd sites.T hus,P d 2 DACp ossessed moderate adsorption strength of CO*, which was beneficial for CO production in CO 2 RR.

Synthesis of red emissive carbon dots (CDs) is highly desirable for sensing applications, as they still remain as bottlenecks in terms of precursor synthesis and product purification. Herein, we have designed a new strategy for realizing efficient red emissive CD optimal emission at 610 nm (fluorescence quantum yield ca. 24.0%) based on solvothermal treatment of citric acid and thiourea using dimethylformamide as solvent. Further investigations reveal that the conjugating sp2-domain controlling the incorporation of nitrogen and surface engineering are mainly responsible for the obtained red emission of CDs. Taking advantage of optical properties and abundant surface functional groups, CDs were considered to facilely construct a ratiometric fluorescent platform for quantifying trace levels of organophosphorus pesticides (OPs). Combining the acetylcholinesterase-mediated polymerization of dopamine and the inhibition of pesticide toward the enzyme, the degree of polymerization of dopamine rationally depends on the concentration of OPs. By measuring the fluorescence intensity ratio, the proposed platform exhibited highly selective and robust performance toward OPs, displaying ultrasensitive recognition in the pg L–1 level. The multiexcitation format could efficiently shield background interference from complex samples by introducing a self-calibrated reference signal, which affords accurate and reliable quantitative information, endowing CDs as a universal candidate for a biosensing application by combining target-specific recognition elements.

Although the application of 1,2-dichloroethane (DCE) as ac hlorinating reagent in organic synthesis with the concomitant release of vinyl chloride as au seful byproduct is afantastic idea, it still presents atremendous challenge and has not yet been achieved because of the harsh dehydrochlorination conditions and the sluggish C À Hc hlorination process.Here we report ab ifunctional electrocatalysis strategy for the catalytic dehydrochlorination of DCE at the cathode simultaneously with anodic oxidative aromatic chlorination using the released HCl as the chloride source for the efficient synthesis of value-added (hetero)aryl chlorides.T he mildness and practicality of the protocol was further demonstrated by the efficient late-stage chlorination of bioactive molecules.

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Dual-atom site catalysts (DACs) have emerged as an ew frontier in heterogeneous catalysis because the synergistic effect between adjacent metal atoms can promote their catalytic activity while maintaining the advantages of singleatom site catalysts (SACs), like 100 %a tomic utilization efficiency and excellent selectivity.H erein, as upported Pd 2 DACw as synthesized and used for electrochemical CO 2 reduction reaction (CO 2 RR) for the first time.The as-obtained Pd 2 DACe xhibited superior CO 2 RR catalytic performance with 98.2 %C Of aradic efficiency at À0.85 Vv s. RHE, far exceeding that of Pd 1 SAC, and coupled with long-term stability.T he density functional theory (DFT) calculations revealed that the intrinsic reason for the superior activity of Pd 2 DACt owardC O 2 RR was the electron transfer between Pd atoms at the dimeric Pd sites.T hus,P d 2 DACp ossessed moderate adsorption strength of CO*, which was beneficial for CO production in CO 2 RR.