Origin of high photoluminescence yield and high SERS sensitivity of nitrogen-doped graphene quantum dots

Das, Ruma; Parveen, Sumaiya; Bora, Abhilasha; Giri, P. K.

doi:10.1016/j.carbon.2020.01.030

Cited by 105 publications

(76 citation statements)

References 58 publications

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“…In addition to the listed above non-metallic SERS-active materials, which we chose to describe in more detail, the SERS substrates have been also generated from many other compounds, for example (the estimated SERS enhancement factor is given in brackets): V 2 O 5 [ 84 ], GaP (700) [ 85 ], ZnS (10 3 ) [ 86 ], CdS (10 3 ) [ 87 ], CdSe (2 × 10 3 ) [ 88 , 89 ], PbS (800) [ 90 ], graphene (3.2 × 10 3 ) [ 91 ] (2370) [ 92 ], InAs/GaAs (10 3 ) [ 93 ], WO 3−x [ 94 ], PbTe [ 95 ], boron-doped diamond (BDD) (10 4 –10 5 ) [ 96 ], SnO 2 (10 3 ) [ 97 ], WS 2 [ 98 ], MoS 2 (10 5 ) [ 98 ], TiN (3.5 × 10 3 ) [ 99 , 100 ] or CdTe (10 4 ) [ 101 ]. The detailed description of all SERS-active materials, as in the case of the described above non-metallic nanostructured thin films or non-metallic nanoparticles covered by plasmonic metals, is, however, beyond the purpose of this work.…”

Section: Sers Substrates That Do Not Contain Nanostructured Metalsmentioning

confidence: 99%

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

2020

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The efficiency of the generation of Raman spectra by molecules adsorbed on some substrates (or placed at a very close distance to some substrates) may be many orders of magnitude larger than the efficiency of the generation of Raman spectra by molecules that are not adsorbed. This effect is called surface-enhanced Raman scattering (SERS). In the first SERS experiments, nanostructured plasmonic metals have been used as SERS-active materials. Later, other types of SERS-active materials have also been developed. In this review article, various SERS substrates formed on nanostructured non-metallic materials, including non-metallic nanostructured thin films or non-metallic nanoparticles covered by plasmonic metals and SERS-active nanomaterials that do not contain plasmonic metals, are described. Significant advances for many important applications of SERS spectroscopy of substrates based on nanostructured non-metallic materials allow us to predict a large increase in the significance of such nanomaterials in the near future. Some future perspectives on the application of SERS substrates utilizing nanostructured non-metallic materials are also presented.

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Section: Sers Substrates That Do Not Contain Nanostructured Metalsmentioning

confidence: 99%

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

2020

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“…For instance, a simple procedure has been developed through the change of solvents applied in the hydrothermal procedure. Das et al [25] reported the production of N doped graphene quantum dots (GQDs) from hydrothermal treatment in dispersions of graphene oxide in dimethylformamide, while S-doped GQDs are observed after hydrothermal treatment of dispersion of GO in dimethyl sulfoxide.…”

Section: Synthesis Of Carbon-based Nanostructuresmentioning

confidence: 99%

“…The deposition of nanocomposites on Si substrates takes place from direct dip coating of nanocomposites on cleaned Si (100) substrates [25] and the self-assembly of structures upon electrostatic interaction on treated surfaces [56].…”

Section: Preparation Of Sers Devicesmentioning

confidence: 99%

“…The typical values for nitrogen-doped graphene quantum dots are reported to be in the order of 3.2 × 10 3 [25].…”

Section: Performance In the Detection Of Analytesmentioning

confidence: 99%

“…Based on these aspects, it is worth mentioning that outstanding physical and chemical properties of carbon dots (such as chemical stability, low toxicity, and ease functionalization-surface modification) [24] have been conveniently explored for its use as a catalyst in metal nanoparticle synthesis. It is reported in the literature that N-doped graphene carbon dots are responsible for reinforcement in the SERS sensitivity in metal/GQD nanocomposites [25,26] and that nanocatalyst concentration results in a higher concentration of metal nanoparticles [27]. It is also known that nitrogen-doped nanostructures (also rich in oxygenbased functional groups) favor the rapid conversion of silver nitrate to form silver nanoparticles [28].…”

Section: Introductionmentioning

confidence: 99%

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Metal nanoparticles/carbon dots nanocomposites for SERS devices: trends and perspectives

Oliveira

Gomes

2020

SN Appl. Sci.

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Carbon dots and carbon dots-based nanocomposites have found a myriad of technological applications. Despite the primary use of carbon dots as catalysts in the reduction process to form metal nanoparticles, their strong interaction with metal nanostructures in nanocomposites can be further exploited. By tuning the emission of carbon dots and the absorption band of metal nanoparticles, it is possible to reach adequate surface-enhanced Raman scattering (SERS) from the resulting nanocomposites. Herein, it is reported the state-of-art in metal/carbon dots nanocomposites applied as active elements for SERS devices in the detection of traces of analytes. Strategies of synthesis, morphology (aggregation and anti-aggregation methods) and the improvement in the homogeneous distribution of noble metal nanoparticles on substrates have been discussed to reach the best performance for highly efficient SERS devices.

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An Alloy Platform of Dual‐Fingerprints for High‐Performance Stroke Screening

Shu

Zhang

et al. 2022

Adv Funct Materials

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A multi‐modal serum profiling platform holds promise for precision diagnosis of diseases. Still, advanced tools are in demand to deliver the multi‐modal serum profiling. Herein, a bimodal spectrometric protocol is designed for stoke serum profiling using an alloy platform, by integrating label‐free surface‐enhanced Raman spectroscopy (SERS) and laser desorption/ionization mass spectrometry (LDI‐MS). The PdAu@Au concave cube with a wide localized surface plasmonic resonance (LSPR) range simultaneously enhances the signals from SERS and LDI‐MS, enabling high‐throughput co‐detection of vibrational and metabolic fingerprints of 0.1 µL serum in 2 min with simple pretreatment. Further, a dual‐fingerprints screening model of stroke is constructed, by adaptive machine learning with a programming nonlinear fitting model. The area under the curve are 0.949 (0.917–0.977, 95% confidence interval (CI)) and 0.911 (0.812–0.984, 95% CI), in the discovery and validation cohorts, respectively. Finally, five metabolites are identified that correlated to SERS signals and mapped the relevant pathways. This study features high performance in terms of throughput, speed, sample volume, and accuracy, providing new insight into the construction of multiplexed characterization platforms for precision diagnostic.

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Origin of high photoluminescence yield and high SERS sensitivity of nitrogen-doped graphene quantum dots

Cited by 105 publications

References 58 publications

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

Substrates for Surface-Enhanced Raman Scattering Formed on Nanostructured Non-Metallic Materials: Preparation and Characterization

Metal nanoparticles/carbon dots nanocomposites for SERS devices: trends and perspectives

An Alloy Platform of Dual‐Fingerprints for High‐Performance Stroke Screening

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