Sensitive and selective aggregation based colorimetric sensing of Fe3+ via interaction with acetyl salicylic acid derived gold nanoparticles

Memon, Safia Sanam; Nafady, Ayman; Solangi, Amber R.; Al-Enizi, Abdullah M.; Sirajuddin, Sirajuddin; Shah, Muhammad Raza; Sherazi, Syed Tufail Hussain; Memon, Shabuddin; Arain, Munazza; Abro, Muhammad Ishaque; Khattak, Manzoor Iqbal

doi:10.1016/j.snb.2017.12.162

Cited by 45 publications

(21 citation statements)

References 23 publications

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“…which are indexed as (2 2 0), (6 0 0), (0 0 6), (6 3 0), and 7 1 3, respectively [14]. The peak which appears at 28.6° and 38.4° is belonging to (1 1 1) plane of Si and Au [15,16], respectively, along with peak of ZnO at 34.6° having (0 0 2) plane [17]. It is observed that substrate and pre-deposited gold shows maximum intensity in all the samples which is attributed to the thin porous layer deposited over the substrate.…”

Section: Methodsmentioning

confidence: 99%

Thermoelectric Properties of Oxide Semiconductors

Nabi¹,

Ali²,

Arshad³

et al. 2019

Solid State Physics [Working Title]

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In this chapter, we have explored the potential of oxide semiconductors for thermoelectric power generation. Various oxides (Cu 2 InO 4 , CuAlO 2 , and Zn 2 GeO 4) were grown on Si substrate by thermal evaporation method using tube furnace. After the growth, a representative sample of each oxide was cut into pieces and was annealed at various temperatures from 600 to 800°C in oxygen environment for 1 h using a programmable furnace. The structure of all annealed sample was verified by performing X-ray powder diffraction (XRD) measurements. XRD data suggested that all oxide materials show crystalline behavior at annealing temperature 800°C. XRD results further confirmed that crystal structure of investigated samples improved significantly with annealing because the intensity of oxygen-sensitive (0 0 6) plane was found to be increased with annealing temperature. To investigate the thermoelectric properties of annealed samples, Seebeck effect and Hall effect measurements were performed in the temperature range 25-100°C. It was found that the value of Seebeck coefficient and power factor increased as the annealing temperature increases. Zn 2 GeO 4 was found to be a potential thermoelectric material because it has the highest value of Seebeck coefficient and power factor. This highest value is related to the presence of secondary phases in this oxide.

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Section: Methodsmentioning

confidence: 99%

Thermoelectric Properties of Oxide Semiconductors

Nabi¹,

Ali²,

Arshad³

et al. 2019

Solid State Physics [Working Title]

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“…Over the past decades, various researchers are focused on the synthesis of nanostructured materials for the detection of copper ion on the basis of the high surface‐to‐volume ratio of nanomaterials . Among all noble nanomaterial, gold nanoparticles (Au NPs) have attracted much attention due to their different properties such as magnetic, catalytic properties, sensing properties, optical properties and electronic properties . It gives a strong surface plasmon resonance (SPR) absorption peak in the UV‐visible region.…”

Section: Introductionmentioning

confidence: 99%

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

et al. 2019

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An efficient and eco‐friendly approach is adopted for the synthesis of highly stable L‐alanine assisted nano gold based polyvinyl alcohol nanocomposite hybrid films (Au/PVA).The –COOH groups of L‐alanine and oxygeneous groups of polyvinyl alcohol are utilized for the synthesis of size controlled gold nanoparticles. The as‐synthesized nanocomposites show rapid and selective detection of Cu2+ ion in aqueous medium. With addition Cu2+ ion to as‐synthesized nanocomposites, the SPR peaks of Au NPs (538 nm) decrease with occurrence of a red shift as well as a new peak is observed at higher wavelength which is due to the aggregation of gold nanoparticles in the nanocomposites hybrid films. Scanning electron microscope (SEM) micrograph and energy dispersive spectroscopy (EDS) reveal the aggregation of gold nanoparticles in the nanocomposite hybrid films. The limit of detection and limit of quantification for Cu2+ ion are 40 nM and 133 nM respectively. This technique for detection of Cu2+ ion in waste water samples is inexpensive and eco‐friendly since no any toxic chemicals are used. In the presence of Cu2+ ion, the colour of the hybrid film is changed hence, this method also involves visual detection of Cu2+ ion without use of electrolyte or transducer. Further, many reported methods represent the in situ monitoring of Cu2+ ion, but the present hybrid film can be used for in situ as well as ex situ monitoring of Cu2+ ion.

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“…9,10 In the last decade, nanoscaled materials have been reported as selective probes for metal ions, including Fe 3+ . [11][12][13][14][15][16][17][18][19][20][21][22][23][24] Silver nanoparticles (AgNPs) are of particular interest because of the affordable price of starting materials, ease of controlling size and morphology, possibility to functionalize their surface with organic molecules, and optical properties that enable detection of a variety of analytes via simple UV-vis spectroscopy and digital image analysis. Furthermore, applications of AgNPs are also biotechnologically relevant due to the possibility of green synthetic protocols, including the use of plant extracts, 25 natural sources, 26 glycerol, 27 among others.…”

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confidence: 99%

“…The limits of detection and quantication were found to be 17 nmol L À1 and 56 nmol L À1 , respectively, which is very satisfactory. 13,14 The inuence of other cations in the detection of Fe 3+ was investigated by UV-vis spectroscopy. Fig.…”

mentioning

confidence: 99%

“…[38][39][40][41] Metal-based nanoparticles have emerged as potential probes for detection of Fe 3+ . [11][12][13][14][15][16] Although effective in Fe 3+ sensing, the synthesis of these nanoprobes require some toxic reagents, such as NaBH 4 or PVP, use plant extracts, which may lead to some drawbacks, such as the understanding of the sensing mechanism. In contrast, our method is based on commercially available, nontoxic, low-cost reagents.…”

mentioning

confidence: 99%

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