Bottom-up fabrication of photoluminescent carbon dots with uniform morphology via a soft–hard template approach

2013 ◽  
Vol 49 (43) ◽  
pp. 4920 ◽  
Author(s):  
Yuxing Yang ◽  
Dongqing Wu ◽  
Sheng Han ◽  
Pengfei Hu ◽  
Ruili Liu
Keyword(s):  
Carbon Dots ◽  
Hard Template ◽  
Bottom Up

scholarly journals Bottom-up Fabrication of Graphene on Silicon/Silica Substrate via a Facile Soft-hard Template Approach

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuxing Yang ◽  
Ruili Liu ◽  
Jiayang Wu ◽  
Xinhong Jiang ◽  
Pan Cao ◽  
...  
Keyword(s):  
Hard Template ◽  
Bottom Up ◽  
Silica Substrate

Investigation from chemical structure to photoluminescent mechanism: a type of carbon dots from the pyrolysis of citric acid and an amine

2015 ◽  
Vol 3 (23) ◽  
pp. 5976-5984 ◽  
Author(s):  
Yubin Song ◽  
Shoujun Zhu ◽  
Shitong Zhang ◽  
Yu Fu ◽  
Li Wang ◽  
...  
Keyword(s):  
Citric Acid ◽  
Carbon Dots ◽  
Chemical Structure ◽  
Molecular State ◽  
Bottom Up

We clarified the chemical structure of typical “bottom-up” CDs and proved that IPCA is the molecular state photoluminescence center.

Mild bottom-up synthesis of carbon dots with temperature-dependent fluorescence

2021 ◽  
pp. 118311
Author(s):  
Hong-Gang Ye ◽  
Xuan Lu ◽  
Rui Cheng ◽  
Jiazhuang Guo ◽  
He Li ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Temperature Dependent ◽  
Bottom Up

Carbon dots with aggregation induced emission enhancement for visual permittivity detection

2016 ◽  
Vol 52 (10) ◽  
pp. 2063-2066 ◽  
Author(s):  
Ze Xi Liu ◽  
Zhu Lian Wu ◽  
Ming Xuan Gao ◽  
Hui Liu ◽  
Cheng Zhi Huang
Keyword(s):  
Carbon Source ◽  
Tannic Acid ◽  
Carbon Dots ◽  
Radiative Decay ◽  
Surface Groups ◽  
Bottom Up ◽  
Aggregation Induced Emission ◽  
Synthesis Route ◽  
Emission Enhancement

A simple and rapid bottom-up synthesis route to synthesize TA–CDs by using tannic acid (TA) as the carbon source was developed, which show visual permittivity dependent aggregation induced emission enhancement (AIEE) properties owing to the hampered rotations of the surface groups on CDs and reduced non-radiative decay during CD aggregation.

Bottom-up, hard template and scalable approaches toward designing nanostructured Li2S for high performance lithium sulfur batteries

Nanoscale ◽  
2015 ◽  
Vol 7 (43) ◽  
pp. 18071-18080 ◽  
Author(s):  
Lin Chen ◽  
Yuzi Liu ◽  
Nancy Dietz-Rago ◽  
Leon L. Shaw
Keyword(s):  
High Performance ◽  
Hard Template ◽  
Bottom Up ◽  
Lithium Sulfur Batteries ◽  
High Theoretical Capacity ◽  
Lithium Sulfur

Li2S with a high theoretical capacity of 1166 mA h g−1 and the capability to pair with lithium free anodes has drawn much attention for lithium sulfur (Li–S) battery applications.

scholarly journals Evaluation of Different Bottom-up Routes for the Fabrication of Carbon Dots

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1316
Author(s):  
Diana M. A. Crista ◽  
Joaquim C. G. Esteves da Silva ◽  
Luís Pinto da Silva
Keyword(s):  
Hydrothermal Synthesis ◽  
Carbon Dots ◽  
Surface States ◽  
Green Emission ◽  
Systematic Evaluation ◽  
High Yield ◽  
Quantum Yields ◽  
Bottom Up ◽  
Fluorescence Quantum Yields

Carbon dots (CDs) are carbon-based nanoparticles with very attractive luminescence features. Furthermore, their synthesis by bottom-up strategies is quite flexible, as tuning the reaction precursors and synthesis procedures can lead to an endless number of CDs with distinct properties and applications. However, this complex variability has made the characterization of the structural and optical properties of the nanomaterials difficult. Herein, we performed a systematic evaluation of the effect of three representative bottom-up strategies (hydrothermal, microwave-assisted, and calcination) on the properties of CDs prepared from the same precursors (citric acid and urea). Our results revealed that these synthesis routes led to nanoparticles with similar sizes, identical excitation-dependent blue-to-green emission, and similar surface-functionalization. However, we have also found that microwave and calcination strategies are more efficient towards nitrogen-doping than hydrothermal synthesis, and thus, the former routes are able to generate CDs with significantly higher fluorescence quantum yields than the latter. Furthermore, the different synthesis strategies appear to have a role in the origin of the photoluminescence of the CDs, as hydrothermal-based nanoparticles present an emission more dependent on surface states, while microwave- and calcination-based CDs present an emission with more contributions from core states. Furthermore, calcination and microwave routes are more suitable for high-yield synthesis (~27–29%), while hydrothermal synthesis present almost negligible synthesis yields (~2%). Finally, life cycle assessment (LCA) was performed to investigate the sustainability of these processes and indicated microwave synthesis as the best choice for future studies.

scholarly journals A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1265
Author(s):  
Federico Bruno ◽  
Alice Sciortino ◽  
Gianpiero Buscarino ◽  
Maria Laura Soriano ◽  
Ángel Ríos ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carbon Dots ◽  
Carbon Nanodots ◽  
Fluorescent Nanoparticles ◽  
Mercury Ions ◽  
Top Down ◽  
Structural And Optical Properties ◽  
Bottom Up ◽  
Interaction Sites ◽  
Sensing Applications

We report a study of carbon dots produced via bottom-up and top-down routes, carried out through a multi-technique approach based on steady-state fluorescence and absorption, time-resolved fluorescence spectroscopy, Raman spectroscopy, infrared spectroscopy, and atomic force microscopy. Our study focuses on a side-to-side comparison of the fundamental structural and optical properties of the two families of fluorescent nanoparticles, and on their interaction pathways with mercury ions, which we use as a probe of surface emissive chromophores. Comparison between the two families of carbon dots, and between carbon dots subjected to different functionalization procedures, readily identifies a few key structural and optical properties apparently common to all types of carbon dots, but also highlights some critical differences in the optical response and in the microscopic mechanism responsible of the fluorescence. The results also provide suggestions on the most likely interaction sites of mercury ions at the surface of carbon dots and reveal details on mercury-induced fluorescence quenching that can be practically exploited to optimize sensing applications of carbon dots.

scholarly journals A polystyrene/WO3 opal composite monolayer film as a building block for the fabrication of 3D WO3 inverse opal films

RSC Advances ◽  
2017 ◽  
Vol 7 (73) ◽  
pp. 46406-46413 ◽  
Author(s):  
Hua Li ◽  
Jian Feng Wang ◽  
Guillaume Vienneau ◽  
Guo Bin Zhu ◽  
Xi Gang Wang ◽  
...  
Keyword(s):  
Building Block ◽  
Inverse Opal ◽  
Large Area ◽  
Monolayer Film ◽  
Hard Template ◽  
Bottom Up

Large area Polystyrene/WO3 opal composite monolayers were successfully fabricated via a modified “dynamic-hard-template” infiltration strategy, and then used as building block for the synthesis of 3D WO3 inverse opal films in a bottom-up approach.

The formation mechanism and fluorophores of carbon dots synthesized via a bottom-up route

2020 ◽  
Vol 4 (2) ◽  
pp. 400-420 ◽  
Author(s):  
Dan Qu ◽  
Zaicheng Sun
Keyword(s):  
Optical Properties ◽  
Formation Mechanism ◽  
Carbon Dots ◽  
Practical Application ◽  
Bottom Up ◽  
Basic Understanding

Carbon dots (CDs) with incomparable optical properties have attracted extensive attention. However, some unclear issues remain, which has impeded the basic understanding and practical application of CDs.

Controllable and mass fabrication of highly luminescent N-doped carbon dots for bioimaging applications

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22343-22349 ◽  
Author(s):  
Zhao Chen ◽  
Xiaochi Wang ◽  
Hua Li ◽  
Chao Li ◽  
Qinghua Lu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Cell Imaging ◽  
Bottom Up ◽  
Doped Carbon Dots

A facile but effective bottom-up method was developed for the mass preparation of N-doped carbon dots (N–C-dots) for cell imaging.

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