Abstract Carbon quantum dots (CQD) were prepared from three different precursors and by three bottom-up synthesis methods: classical pyrolysis of citric acid (CAP), microwave irradiation of glucose (GM), and hydrothermal treatment of glucosamine hydrochloride (GAH). CQD were further functionalized using various nitrogen-containing compounds: 6-aminohexanoic acid, 1,6-diaminohexane, N-octylamine, dimethylamine, and tryptophan. Special attention was dedicated to investigate how the combination of synthetic method and starting material affected the nature and properties of CQD. The analysis indicated that CAP were good candidates for covalent post-functionalization, GM allowed an easy passivation, and GAH permitted the direct introduction of nitrogen into the core. The size distribution showed a core–shell structure for CQD functionalized with an aminoacid by microwave irradiation, whereas the thermal decomposition evidenced the degradation of functionalizing molecules and the presence of pyridinic and pyrrolic nitrogen after hydrothermal synthesis. Photoluminescence spectra revealed important differences between the synthesis techniques, related to the occurrence of surface states, and the highest fluorescence quantum yield for hydrothermally prepared CQD. These approaches led to CQD with properties that can be exploited in many fields from energy conversion to sensing.

A. R. Nallayagari

E. Sgreccia

R. Pizzoferrato

M. Cabibbo

S. Kaciulis

E. Bolli

L. Pasquini

P. Knauth

M. L. Di Vona

Journal of nanostructure in chemistry

JOURNAL OF NANOSTRUCTURE IN CHEMISTRY (JNSC) 报道纳米化学、纳米农业、纳米科学和纳米技术的理论和实践的所有分支的基础研究，提供研究的关键要素的快速披露，发表关于物理的初步、实验和理论结果、化学和生物现象，以及纳米级结构的过程和应用。该期刊涵盖的感兴趣领域包括：- 通过物理、化学和生物方法合成和加工有机、无机和混合纳米材料- 合成、组装和相互作用过程的建模和模拟- 尺寸相关特性的表征- 新型纳米结构和纳米器件的实现和应用

The Journal of Nanostructure in Chemistry (JNSC) publishes fundamental research in the fields of nanochemistry, nanoagriculture, nanoscience, and nanotechnology, covering all branches of theory and practice. The journal provides rapid disclosure of key elements of research, publishing preliminary, experimental, and theoretical results related to physical, chemical, and biological phenomena, as well as processes and applications of nanoscale structures. Areas of interest include: - Synthesis and processing of organic, inorganic, and hybrid nanomaterials using physical, chemical, and biological methods; - Modeling and simulation of synthesis, assembly, and interaction processes; - Characterization of size-dependent properties; - Realization and application of novel nanostructures and nanodevices.

《Journal of Nanostructure in Chemistry》(JNSC) 报道纳米化学、纳米农业、纳米科学和纳米技术的基础研究，涵盖理论与实践的各个方面。该期刊快速披露研究的关键要素，发表关于物理、化学和生物现象的初步、实验和理论结果，以及纳米级结构的过程和应用。感兴趣的领域包括：- 通过物理、化学和生物方法合成和加工有机、无机和混合纳米材料；- 合成、组装和相互作用过程的建模与模拟；- 尺寸相关特性的表征；- 新型纳米结构和纳米器件的实现与应用。

Category	Quartile
化学	1
化学, 化学综合	2
化学, 材料科学综合	2
化学, 纳米科技	2

Tuneable properties of carbon quantum dots by different synthetic methods

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	1