A fast and mild synthesis method of highly crystalline CdTe nanorods (NRs) was developed by adding europium nitrate hexahydrate to an aqueous solution of CdTe nanocrystals (NCs) at room temperature within 30 min. It was suggested that strong coordination strength of Eu(III) decreases zeta potential, thereby accelerates aggregation of NCs, and favors the transformation process from NCs to NRs. The oriented attachment of aggregated particles was suggested as a major path for the formation of highly crystalline NRs under experimental conditions. The proposed extremely fast room-temperature methodology opens up novel pathways for the synthesis of one-dimensional (1D) semiconductor nanostructures with high crystallinity, which would become potential candidates for many practical applications such as photovoltaics, circuit design and fabrication of functional architectures.
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http://dx.doi.org/10.1016/j.talanta.2014.01.042 | DOI Listing |
Biomed Phys Eng Express
January 2025
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, People's Republic of China.
The optimal method for three-dimensional thermal imaging within cells involves collecting intracellular temperature responses while simultaneously obtaining corresponding 3D positional information. Current temperature measurement techniques based on the photothermal properties of quantum dots face several limitations, including high cytotoxicity and low fluorescence quantum yields. These issues affect the normal metabolic processes of tumor cells.
View Article and Find Full Text PDFAnal Bioanal Chem
January 2025
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
Although fluorescence analysis methods are widely used in pesticide residue detection, improving their sensitivity and selectivity remains a challenge. This paper presents a novel ratio fluorescence sensor based on the molecular imprinting polymers (MIPs) and metal-enhanced fluorescence for visual detection of dicamba (DIC). Calcium fluoride (CaF) quantum dots (QDs) were immobilized on the surface of Ag@MIPs, resulting in a blue fluorescence response signal (Ag@MIPs-CaF).
View Article and Find Full Text PDFMolecules
December 2024
State Key Laboratory of Molecular Engineering of Polymers, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200438, China.
With the development and improvement of analysis and detection systems, low-toxicity and harmless detection systems have received much attention, especially in the field of food detection. In this paper, a low-toxicity dual-emission molecularly imprinted fluorescence sensor (CdTe QDs@SiO/N-CDs@MIPs) was successfully designed for highly selective recognition and visual detection of tetracycline (TC) in food samples. Specifically, the non-toxic blue-emission N-doped carbon dots (N-CDs) with high luminous performance acted as the response signals to contact TC via the covalent bond between amino and carboxyl groups.
View Article and Find Full Text PDFMikrochim Acta
December 2024
State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China.
A dual-signal aptamer-based assay utilizing colorimetric and fluorescence techniques was developed for the determination of zearalenone (ZEN). The CdTe quantum dots, serving as the fluorescent signal source, were surface-modified onto FeO@SiO and subsequently functionalized with the aptamer. The COF-Au was modified with complementary chain, which possessed peroxide (POD)-like enzyme properties, and could catalyze the peroxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to ox TMB, resulting in the generation of colorimetric signals.
View Article and Find Full Text PDFBiosens Bioelectron
March 2025
TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy, Hunan·University of Chinese Medicine, Changsha, China. Electronic address:
Compared to single-mode detection, dual-mode sensing strategies have garnered increasing attention from researchers due to their superior detection accuracy and reliability. Exosomes, as non-invasive biomarkers, hold significant potential for disease diagnosis. However, sensitive and precise detection of exosomes still presents considerable technical challenges.
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