Spectroscopic Techniques Based on the Use of Gold Nanoparticles

Parra, María Jesús Almendral; Paradinas, Sara Sánchez

doi:10.1016/b978-0-444-63285-2.00012-2

Cited by 6 publications

(4 citation statements)

References 177 publications

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“…This shows that the absorbance peak of gold shifted to higher wavelengths when it was reduced and capped with citrate. This is known as surface plasmon resonance (SPR) [ 33 ]. It is important to note that the distance between the gold nanoparticles which are reciprocal, as well as their shape and size, affect this SPR.…”

Section: Methodsmentioning

confidence: 99%

“…The SPR is around 529 nm for these synthesised gold nanoaparticles. This characteristic red colour is due to the distance between the gold nanoparticles, size, and an absorption overlapping between AuNPs [ 33 ]. This absorption is due to interband transitions such as an excitation of a single optical electron from a full 5 d band level to an empty 6s–6p band level of AuNPs [ 34 ].…”

Section: Methodsmentioning

confidence: 99%

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Development of gold plasmonic nanoparticles for detection of polydiallyldimethylammonium chloride at Umgeni water treatment plants: An optimised study and case application

Mthembu

Akintayo

Moodley

et al. 2023

Heliyon

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Development of gold plasmonic nanoparticles for detection of polydiallyldimethylammonium chloride at Umgeni water treatment plants: An optimised study and case application

Mthembu

Akintayo

Moodley

et al. 2023

Heliyon

View full text Add to dashboard Cite

“…This is because of the significant influence of the distance on the energy transfer capability. 34 The quantum efficiency of the energy transfer is given by the Förster formula: where E is the FRET efficiency, R is the distance between the donor and acceptor, and R 0 is the distance at which the efficiency of the energy transfer is 50%. The highest efficiency of the energy transfer is obtained in the donor–acceptor distance range from 0.5 to 1.5 of the R 0 distance.…”

Section: Operating Principles Of Optical Sensorsmentioning

confidence: 99%

“…Moreover, FRET requires that the dipole moments of the donor and acceptor are properly aligned as well as that the distance between them is lower than 10 nm. This is because of the significant influence of the distance on the energy transfer capability . The quantum efficiency of the energy transfer is given by the Förster formula: where E is the FRET efficiency, R is the distance between the donor and acceptor, and R 0 is the distance at which the efficiency of the energy transfer is 50%.…”

Section: Operating Principles Of Optical Sensorsmentioning

confidence: 99%

New Trends in Fluorescent Nanomaterials-Based Bio/Chemical Sensors for Neurohormones Detection─A Review

et al. 2022

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The study of neurotransmitters and stress hormones allows the determination of indicators of the current stress load in the body. These species also create a proper strategy of stress protection. Nowadays, stress is a general factor that affects the population, and it may cause a wide range of serious disorders. Abnormalities in the level of neurohormones, caused by chronic psychological stress, can occur in, for instance, corporate employees, health care workers, shift workers, policemen, or firefighters. Here we present a new nanomaterials-based sensors technology development for the determination of neurohormones. We focus on fluorescent sensors/biosensors that utilize nanomaterials, such as quantum dots or carbon nanomaterials. Nanomaterials, owing to their diversity in size and shape, have been attracting increasing attention in sensing or bioimaging. They possess unique properties, such as fluorescent, electronic, or photoluminescent features. In this Review, we summarize new trends in adopting nanomaterials for applications in fluorescent sensors for neurohormone monitoring.

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Noble Metals, Analytical Chemistry of

Balcerzak¹

2021

Encyclopedia of Analytical Chemistry

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Attractive physical, chemical, and biological properties of the noble (precious) metals – ruthenium, rhodium, palladium, osmium, iridium, and platinum (so‐called platinum group metals (PGM)) and gold – result in their wide applications. The main demands for the metals are from autocatalysts; chemical, electrical, and electronic industries; jewelry and investment. Medical applications of some noble metal compounds, in particular those exhibiting anticancer activity, are of great importance. The large variety and complexity of the examined (geological, environmental, industrial, and biological) materials, great chemical similarities and low stability of the noble metal species in solutions, and wide concentration (from sub‐ppb to >99.99%) ranges to be determined make the accurate determination of the metals a difficult analytical problem. Identification and quantification of various chemical forms (elemental, complex) of the metals in the examined samples require methods capable of separation of the analytes from the interfering matrix components and their detection. The choice of a suitable sample preparation procedure and its successful coupling with the detection technique of required selectivity and sensitivity are fundamental factors limiting the quality of the results. Analytical methods applicable in the analysis of the noble metal samples are presented in the article.

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Spectroscopic Techniques Based on the Use of Gold Nanoparticles

Cited by 6 publications

References 177 publications

Development of gold plasmonic nanoparticles for detection of polydiallyldimethylammonium chloride at Umgeni water treatment plants: An optimised study and case application

Development of gold plasmonic nanoparticles for detection of polydiallyldimethylammonium chloride at Umgeni water treatment plants: An optimised study and case application

New Trends in Fluorescent Nanomaterials-Based Bio/Chemical Sensors for Neurohormones Detection─A Review

Noble Metals, Analytical Chemistry of

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