Optical, morphological, electrical properties and white light photoresponse of CdSe nanoparticles

Mohammed, Kahtan A.; Ziadan, Kareema M.; Al-Kabbi, Alaa S.; Saxena, Kuldeep K.; Zabibah, Rahman S.; Alrubaie, Ali Jawad; Mohammed, Jalal Hasan

doi:10.1080/2374068x.2022.2037877

Cited by 8 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, it is important to mention that the band gap of QDs decreases with increasing particle size. With the reaction time ranging from 30 m to 2 h, the band gap of CdSe-GSH core particles decreased from 2.75 to 2.56 eV, causing the red-shift in the UV–Vis spectra . The detected values of E g are higher than the value of the bulk energy gap of CdSe particles (1.74 eV) because of quantum confinement in the CdSe/ZnS-GSH QDs.…”

Section: Resultsmentioning

confidence: 93%

“…With the reaction time ranging from 30 m to 2 h, the band gap of CdSe-GSH core particles decreased from 2.75 to 2.56 eV, causing the red-shift in the UV−Vis spectra. 43 The detected values of E g are higher than the value of the bulk energy gap of CdSe particles (1.74 eV) because of quantum confinement in the CdSe/ZnS-GSH QDs. The band gap of QDs is affected by the presence of defect-induced energy levels between the conduction and valence bands.…”

Section: Preparation Of Zinc Acetate and Sodium Sulfide Stock Solutionmentioning

confidence: 86%

See 1 more Smart Citation

A Simplified Approach for the Aqueous Synthesis of Luminescent CdSe/ZnS Core/Shell Quantum Dots and Their Applications in Ultrasensitive Determination of the Biomarker 3-Nitro-l-tyrosine

et al. 2022

View full text Add to dashboard Cite

In contrast to the hot-injection organometallic routes, synthesizing stable and highly luminescent core/shell nanocrystals with encapsulation of biocompatible groups through an aqueous route is a long-standing challenge. In recent years, relatively high quantum efficiency and unique properties of core/shell nanostructured materials (quantum dots) have contributed toward enhancement in sensing capability. The present work reports a facile aqueous synthesis process of core/shell CdSe/ZnS quantum dots (QDs) with encapsulation of glutathione (GSH). The optimal conditions for the synthesis of the most stable particles were ascertained, and the different experimental analyses suggest that the stable core/shell QDs in question have good crystallinity with a size around 4.7 nm with a shell thickness of 0.7 nm and a photoluminescence quantum yield of about 35%. Further, it is demonstrated that the as-synthesized material has great potential in detecting as low as 0.28 nM 3-nitro-l-tyrosine (3-NT), an important marker for oxidative stress, the level of which in our body signals several chronically diseased conditions. The enthalpy-driven interactions of CdSe/ZnS-GSH QDs with 3-NT were characterized through steady-state and time-resolved luminescence spectroscopy and isothermal microcalorimetry. The devised method of probing 3-NT was further validated with human serum samples. Thus, the proposed strategy may provide a protocol for selective determination of 3-NT under different pathological conditions.

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Preparation Of Zinc Acetate and Sodium Sulfide Stock Solutionmentioning

confidence: 86%

A Simplified Approach for the Aqueous Synthesis of Luminescent CdSe/ZnS Core/Shell Quantum Dots and Their Applications in Ultrasensitive Determination of the Biomarker 3-Nitro-l-tyrosine

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Natural river Sand that complies with zone II standards and regular portland cement that fulfilled IS: 279-2015 specifications were the materials used in this investigation [12][13][14][15]. In addition, the expriment used locally accessible coarse aggregate, which crushed siliceous stone, with a utmost size of 20 mm The aforementioned materials were meticulously chosen to garantie compliance with established quality requirements and to Preserve uniformity in the experimental configuration, hence augmentent the validity and reliability of the research outcomes.…”

Section: Materials Used and Their Propertiesmentioning

confidence: 99%

Analysing Indirect Methods for Comparatively Determining the Compressive Strength of Materials with Various Properties

Raman,

Dasari,

Chandrashekar

et al. 2024

E3S Web of Conf.

View full text Add to dashboard Cite

The properties and compressive strength of hardened concrete are examined by destructive and non-destructive testing methods. There was no direct relationship between non-destructive testing results for existing concrete structures. This article describes the comparison between rebound and compression hammer tests of hardened concrete. It also describes the comparison of strength and cube compressive strength as well as the comparison of modulus of elasticity according to different standards.Destructive and non-destructive techniques were used in an experimental programme on various concrete mixtures, including M20, M25, and M30. A comprehensive technique was used for evaluating the compressive strength properties of concrete grades M20, M25, and M30, using both destructive and non-destructive testing methods. The impact strength, maximum load, Schmidt hammer, and uniaxial compression test findings have been also reviewed within the examination. The study’s primary purpose was to clarify the connections between specific evaluations technique and actual grades. Similarly, those connections were subjected to an in-depth validation technique using previously advanced formulation from previous research, which produced precious statistics about the assessment of concrete strength. These findings increase our understanding of concrete’s behaviour and provide essential path for destiny packages inside the engineering and construction industries, enabling properly-informed decision-making in those domains.

show abstract

“…Stabilizing black cotton soil with fly ash and RHA-based geopolymer was found to substantially enhance soil strength and reduce swelling and shrinkage, offering a sustainable alternative to traditional stabilizers [9]. Both FA and RHA were observed to decrease liquid limit, plasticity index, and free swell index, while improving the coefficient of permeability and reducing swelling pressure in expansive clay, contingent upon the additive content [10]. Finally, the application of RHA and lime sludge for clay stabilization in civil engineering projects was reviewed, suggesting that a mixture of 10% RHA and 15% lime sludge can effectively stabilize clay [11].…”

Section: Introductionmentioning

confidence: 99%

Improving Soil Properties for Construction Usage with Fly Ash and Rice Husk Ash

Saxena,

Gupta,

Rajalakshmi

et al. 2024

E3S Web of Conf.

View full text Add to dashboard Cite

Changes made to any soil property with the goal of improving the soil’s engineering performance are collectively referred to as soil improvement. This might include enhancing groundwater conditions, decreasing compressibility, minimising permeability, or strengthening the structure’s structural integrity. Soil enhancement might be a short-term solution to make building easier or a long-term strategy to improve the finished structure’s performance over time. Expansive soils, especially black cotton soil, pose serious problems for the building sector because of their negative swelling and shrinking characteristics. The purpose of this study is to better understand how stabilizing substances like fly ash and rice husk ash (RHA) might help address these issues and enhance the qualities of soil suitable for building. To evaluate the efficacy of RHA and fly ash as swell reduction layers and to improve unconfined compressive strength (UCS) in highway construction, the materials will be added to natural soil in different percentages (RHA: 0%, 15%, and 30%; fly ash: 10%, 20%, and 30%). Nine different combinations were tested using UCS after the quantities were established using the Taguchi optimization approach. The results suggest that adding these waste items can greatly strengthen the soil, and that certain combinations work best for stabilizing the soil. The study highlights how soils in construction can be addressed by utilizing sustainable resources like fly ash and RHA.

show abstract

Optical, morphological, electrical properties and white light photoresponse of CdSe nanoparticles

Cited by 8 publications

References 16 publications

A Simplified Approach for the Aqueous Synthesis of Luminescent CdSe/ZnS Core/Shell Quantum Dots and Their Applications in Ultrasensitive Determination of the Biomarker 3-Nitro-l-tyrosine

A Simplified Approach for the Aqueous Synthesis of Luminescent CdSe/ZnS Core/Shell Quantum Dots and Their Applications in Ultrasensitive Determination of the Biomarker 3-Nitro-l-tyrosine

Analysing Indirect Methods for Comparatively Determining the Compressive Strength of Materials with Various Properties

Improving Soil Properties for Construction Usage with Fly Ash and Rice Husk Ash

Contact Info

Product

Resources

About