Enhancing sensitivity of carbon dots as Fe ion sensor using time-resolved photoluminescence technique

Lewa, Ismira Wahyu Lestari; Isnaeni, Isnaeni

doi:10.1007/s11051-020-04988-3

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…There is one absorption peak at a wavelength of 216.0 nm, showing that the Cdots solution absorbs UV spectrum. The PL characterization aims to determine the spontaneous emission of light from an excited material [27,28]. The emission peak of the Cdots is obtained at a wavelength of 512.29 nm.…”

Section: Results and Analysismentioning

confidence: 99%

“…where A and τ are the curve fitting parameters. Thus, the electronic lifetime decay (τ ) of the Cdots can be calculated using [28]:…”

Section: Results and Analysismentioning

confidence: 99%

“…The TRPL measurements were used to determine the sample's lifetime decay curve. The time it takes for electrons to undergo de-excitation is called the lifetime decay [28]. The FTIR (Thermo Nicolet Avatar 360IR) characterization was used to determine the functional groups formed in the Cdots.…”

Section: Characterizations Of the Cdotsmentioning

confidence: 99%

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Measuring the refraction index of luminescent carbon nanodots forming Gaussian beam using the tracker software

Dwandaru,

Zulaikha,

Sulaindra

et al. 2024

Rev. Mex. Fis. E

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Nanotechnology is currently regarded as one of the fastest-growing technologies. Equipping students with some understanding of nanotechnology in relation to physics ideas may trigger their interest and inspire them to learn physics. This study is aimed to measure the refraction index of Cdots solution using the Gaussian beam and Tracker software. The method used in this research is quantitative descriptive method with the stages of research that include designing, construction, developing, and testing the measuring instrument. The procedure in this study begins by preparing the Cdots solution from cajuput oil (CJO) distillation wastes. The Cdots are then characterized using the UV-visible (UV-Vis), photoluminescence (PL), time resolved-PL (TRPL), and Fourier transform infrared (FTIR) spectroscopies. The Cdots solution is then put into a reaction tube with solution height variation. The violet/UV laser pointer is exposed upward towards the Cdots solution from the bottom of the reaction tube producing a Gaussian beam inside the reaction tube. The Gaussian beam is then photographed, which then the format is converted into a video format. The video format of the Gaussian beam is analyzed using the Tracker software. The characterizations of the Cdots show i) an absorption peak at a wavelength of 216.0 nm, ii) an emission peak at 512.29 nm indicating cyan luminescence, iii) an electronic lifetime of 51.3 ns, and iii) functional groups of O-H; C=C; and C=O. Moreover, the Gaussian beams are formed for various heights of the Cdots solution, i.e.: from 5.364 cm to 13.000 cm. Using the Tracker software, the value of the Cdots’ refraction index is 1.29 0.03, which is comparable to the refraction index of water. This measuring instrument has the potential to be used in high school physics classes and/or first-year university physics courses.

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Section: Results and Analysismentioning

confidence: 99%

“…where A and τ are the curve fitting parameters. Thus, the electronic lifetime decay (τ ) of the Cdots can be calculated using [28]:…”

Section: Results and Analysismentioning

confidence: 99%

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Measuring the refraction index of luminescent carbon nanodots forming Gaussian beam using the tracker software

Dwandaru,

Zulaikha,

Sulaindra

et al. 2024

Rev. Mex. Fis. E

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“…To obtain the lifetime properties of Cdots after interaction with heavy metal ions, time-resolve photoluminescence (TRPL) experiments were conducted. Previous studies have shown that observing changes in a lifetime using the TRPL method can increase the observed sensitivity of detecting heavy metal ions [30]. From the TRPL results, it can be seen that there is a change in decay Lifetime decay is when an electron returns to its ground state after being excited (see Figure 5(a)).…”

Section: Selectivity Of Three Heavy Metals Ionsmentioning

confidence: 91%

Optical Response of Various Heavy Metal Ions-Based Carbon Dots Photoluminescent Quenching Effect

Sugiarto,

Yulianto,

Tresna

et al. 2023

J. Phys. Appl.

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Carbon nanodots (Cdots) are a type of semiconductor carbon-based nanomaterial that is gaining popularity due to its excellent characteristics (e.g., biocompatibility, unique optical properties, low cost, eco-friendly, and high stability). In terms of physicochemical properties for an environmentally friendly sensor application, this material also has an excellent ability to detect heavy metal ions in the biosphere. In this study, we proposed a comprehensive optical characterization to examine the sensitivity of the Cdots probe for three heavy metal ions (i.e., Mn, Pb, and Cr ions) and compare the performance. The results of the experiment revealed that each heavy metal ion reacted differently to the physical properties of Cdots. With the addition of Cr, Mn, and Pb metal ions from the original Cdot solution, which is only 1.45 ns, the lifetime of quenched Cdots is 2.55 ns, 3.15 ns, and 2.15 ns, respectively, according to the TRPL experiments. With additional Cr, Mn, and Pb discovered, the intensity of PL dropped by 5.7%, 14.2%, and 21.4%, respectively. Among these various heavy metal ions, Pb ions show the most affected by the quenching effect in Cdots-based photoluminescence, FTIR, and ultraviolet-visible light absorption characterization. Based on the results of three heavy metal ion experiments, this study can be implemented as the heavy metal ion sensor-based luminescence quenching effect of Cdots.

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“…For instance, the PL of CDs is typically excitation dependent, which offers more options in the applicable excitation wavelength in bioimaging . The PL of CDs can be quenched by interactions with the surrounding substances, so CDs are often reported for various sensing application potentials, especially in the detection of metal ions. − For another example, phosphorescent CDs have great application potentials in energy, information, biomedicines, and other fields due to their long lifetime and low background interference …”

Section: Introductionmentioning

confidence: 99%

Structure–Property–Activity Relationships in Carbon Dots

2022

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Carbon dots (CDs) are one of the most versatile nanomaterials discovered in the 21st century. They possess many properties and thus hold potentials in diverse applications. While an increasing amount of attention has been given to these novel nanoparticles, the broad scientific community is actively engaged in exploring their limits. Recent studies on the fractionalization and assembly of CDs further push the limits beyond just CDs and demonstrate that CDs are both a mixture of heterogeneous fractions and promising building blocks for assembly of large carbon-based materials. With CDs moving forward toward both microscopic and macroscopic levels, a good understanding of the structure−property−activity relationships is essential to forecasting the future of CDs. Hence, in this Perspective, structure−property− activity relationships are highlighted based on the repeatedly verified findings in CDs. In addition, studies on CD fractionalization and assembly are briefly summarized in this Perspective. Eventually, these structure−property−activity relationships and controllability are essential for the development of CDs with desired properties for various applications especially in photochemistry, electrochemistry, nanomedicine, and surface chemistry. In summary, in our opinion, since 2004 until the present, history has witnessed a great development of CDs although there is still some room for more studies. Also, considering many attractive properties, structure−property−activity relationships, and the building block nature of CDs, a variety of carbon-based materials of interest can be constructed from CDs with control. They can help reduce blind trials in the development of carbon-based materials, which is of great significance in materials science, chemistry, and any fields related to the applications.

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Enhancing sensitivity of carbon dots as Fe ion sensor using time-resolved photoluminescence technique

Cited by 9 publications

References 39 publications

Measuring the refraction index of luminescent carbon nanodots forming Gaussian beam using the tracker software

Measuring the refraction index of luminescent carbon nanodots forming Gaussian beam using the tracker software

Optical Response of Various Heavy Metal Ions-Based Carbon Dots Photoluminescent Quenching Effect

Structure–Property–Activity Relationships in Carbon Dots

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