Investigation of plasmonic gold–silica core–shell nanoparticle stability in dye-sensitized solar cell applications

Törngren, Björn; Akitsu, Kenta; Ylinen, Anne; Sandén, Simon; Jiang, Hua; Ruokolainen, Janne; Komatsu, Makoto; Hamamura, Tomofumi; Nakazaki, Jotaro; Kubo, Takaya; Segawa, Hiroshi; Österbacka, Ronald; Smått, Jan‐Henrik

doi:10.1016/j.jcis.2013.11.085

Cited by 30 publications

(21 citation statements)

References 44 publications

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“…After digestion of the AuNP@SiO 2 samples (Figure 1a), it was not possible to detect the gold content using strategy S2 (HNO 3 + HCl + MW), and no visual changes were observed in the aspect of the remaining material (Figure 1b). This result indicates the presence of gold nanoparticles inside the nanomaterial (metal on core) is consistent with a core-shell structure, 21,22 i.e., the gold nanoparticle is covered by a nonporous silica layer, protecting the AuNP core 23 during the S2 treatment. In fact, for S2, on comparing the images of the AuNP@SiO 2 samples before and after digestion (Figures 1a and 1b, respectively), it can be observed that the proposed digestion conditions failed to extract the gold nanoparticles present in the silica.…”

Section: Resultssupporting

confidence: 61%

“…It can be noted that for the AuNP@SiO 2 samples the intensity and profile of the surface plasmon absorption band at around 525 nm (before and after digestion) is similar and characteristic of gold ball-shaped nanoparticles. 11,21 For the AuNP/SiO 2 sample after the S2 treatment, the plasmon absorption band is absent, indicating that all gold nanoparticles had been removed from the sample surface. Thus, the UV-Vis spectroscopy results corroborate with the expected data obtained for the sample preparation procedures used.…”

Section: Resultsmentioning

confidence: 99%

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Atomic Absorption Spectrometry as an Alternative to Determine the Presence of Gold Nanoparticles on or in Silica Matrix

Giertyas¹,

Silva²,

Oliveira³

et al. 2022

J. Braz. Chem. Soc.

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Two different gold-silica-based nanomaterials were prepared: (i) silica-supported gold nanoparticles (AuNP/SiO2); and (ii) gold-silica core-shell nanoparticles (AuNP@SiO2). Three strategies for sample treatment (S), consisting in acid treatments, were employed: (S1) HNO3; (S2) HNO3 + HCl; and (S3) HF + HNO3 + HCl, applying microwave oven digestion for S2 and S3. From three calibration curves, slope, intercept, and linear correlation coefficient were obtained. The accuracy of the methods was evaluated by comparing the gold contents in a sample determined by flame atomic absorption spectrometry (FAAS) and by inductively coupled plasma atomic emission spectrometry (ICP-OES). Finally, the amount of gold for all samples was determined by FAAS. UV-Vis spectroscopy and transmission electron microscopy (TEM) were used to compare the material before and after sample treatment. By comparison, the application of S2 and S3 allowed the presence of gold on or in the silica matrix to be determined and the amount quantified.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Atomic Absorption Spectrometry as an Alternative to Determine the Presence of Gold Nanoparticles on or in Silica Matrix

Giertyas¹,

Silva²,

Oliveira³

et al. 2022

J. Braz. Chem. Soc.

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“…The decrease in V oc may be attributed to an increase in backward charge transfer from the TiO 2 to the electrolyte due to exposed GNPs since ~ 20 nm GNPs covered with ~ 20-nm thick SiO 2 films did not cause such a decrease in V oc. The SiO 2 films act as an insulator to inhibit charge recombination on the metal surface [ 21 ]. At this stage, the reason why V oc decreased only in the case of smaller GNPs cannot be explained clearly.…”

Section: Resultsmentioning

confidence: 99%

“…Au nanoparticles (GNPs) are generally applied in the TiO 2 layer by blending with TiO 2 nanopowder, which is then used to fabricate conformal TiO 2 -Au nanocomposite films [ 15 – 17 ]. SiO 2 -coated Au nanoparticles and TiO 2 -coated Ag nanoparticles have also been applied to DSSCs [ 18 – 21 ]. A method of forming Ag nanoparticles on the both top and bottom surfaces of a TiO 2 layer by utilizing sputtering and annealing has been published [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gold Nanoparticle Distribution in TiO2 on the Optical and Electrical Characteristics of Dye-Sensitized Solar Cells

Mayumi

Ikeguchi²,

Nakane³

et al. 2017

Nanoscale Res Lett

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Photoanodes comprising Au nanoparticles (GNPs) and thin TiO2 layers with a stacked structure were fabricated by repeating the application of TiO2 paste and GNP solutions on conductive glass to vary the distribution of GNPs in the TiO2 layer. The plasmon-enhanced characteristics of dye-sensitized solar cells (DSSCs) with such photoanodes were investigated. Both the absorption of the TiO2 layer and the performance of the DSSC are found to be most increased by plasmonic enhancement when GNPs are concentrated near the position in the TiO2 layer, which is the penetration depth of the incident light of wavelength corresponding to the maximum absorption of the N719 dye (~ 520 nm). When a GNP layer with a relatively high density of 1.3 μg/cm2 density was formed at its position, and two GNP layers with a relatively low density of 0.65 μg/cm2 were formed near the front side of the incident light, the short-circuit current density (Jsc) and energy conversion efficiency (η) of the DSSC were found to be 10.8 mA/cm2 and 5.0%, increases of 15 and 11%, respectively, compared with those of the DSSC without GNPs. Our work suggests that optimization of the distribution of GNPs in the TiO2 layer is very important for improving the performance of DSSCs fabricated by utilizing GNPs.Electronic supplementary materialThe online version of this article (10.1186/s11671-017-2285-4) contains supplementary material, which is available to authorized users.

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“…These nanoparticles are scientifically interesting owing to their size and shape dependent physical as well as chemical properties. As a class of materials, many MNPs attract attention mainly to electrical, optical, and biomedical applications [7]. Due to the ease of surface modification of metallic nanoparticles, a number of varied coatings and shells can be applied to nanoparticle synthesis.…”

Section: Introductionmentioning

confidence: 99%

Photoacoustic Signal of Nanobubbles Induced in PEGylated Gold-Nanorod Colloid

Manalu

2019

PISTON J.Tech.Eng

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We have developed a photoacoustic (PA) measurement system using a broadband ultrasonic transducer to detect the PA signals induced in a gold nanorod (GNRs) colloid irradiated by the nanosecond-pulsed laser beam. This study will investigate the PA signals of PEG-GNRs at longitudinal surface plasmon resonance. Several factors including aspect ratio of GNR, pulse energy, concentration, and wavelength are varied to investigate these effects on the PA signal. We show that at the certain condition the generated PA signal of PEG-GNRs stronger than uncoated GNRs. Moreover, the PA signals of PEGGNRs are more stable than uncoated GNRs in the same condition. Keywords

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Investigation of plasmonic gold–silica core–shell nanoparticle stability in dye-sensitized solar cell applications

Cited by 30 publications

References 44 publications

Atomic Absorption Spectrometry as an Alternative to Determine the Presence of Gold Nanoparticles on or in Silica Matrix

Atomic Absorption Spectrometry as an Alternative to Determine the Presence of Gold Nanoparticles on or in Silica Matrix

Effect of Gold Nanoparticle Distribution in TiO2 on the Optical and Electrical Characteristics of Dye-Sensitized Solar Cells

Photoacoustic Signal of Nanobubbles Induced in PEGylated Gold-Nanorod Colloid

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