Characterization of dents and grooves on polymer films using scanning white light interferometry

Kassamakov, Ivan; Ojala, Kari; Salmi, Ari; Hæggström, Edward; Aaltonen, Juha; Huber, Arne; Saarikko, H.; Osterberg, Mathias; Oinonen, M.

doi:10.1117/12.662089

Cited by 14 publications

(16 citation statements)

References 20 publications

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“…A previous report found that irradiation of pear with UVB (280-315 nm) and/or fluorescent lamps for 10 days after harvest not only results in a significant increase in the anthocyanin, flavonoids, chlorophyll, and carotenoid concentration in the peel, but also leads to a slight increase in soluble solid and organic acid concentration and a significant increase in total sugars in the flesh [15], indicating that post-harvest irradiation can permeate through the peel of the whole fruit to affect the inner pulp. Our present study provides further evidence for this.…”

Section: Discussionmentioning

confidence: 99%

LED and UV Light Utilizing Flavonoids and Limonoids to Investigate the Effect of Post-harvest Light Irradiation

Liu¹,

Hu²,

Dong³

et al. 2019

Preprint

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To investigate the effect of post-harvest light irradiation on the accumulation of flavonoids and limonoids, harvested Newhall navel oranges were continuously exposed to light-emitting diode (LED) and ultraviolet (UV) light irradiation for 6 days, and the composition and content of flavonoids and limonoids in the segments were determined using UPLC-qTOF-MS at 0, 6, and 15 days after harvest. In total, six polymethoxylated flavonoids (PMFs), five flavone-O/C-glycosides, seven flavanone-O-glycosides, and three limonoids were identified in the segments. The accumulation of these components was altered by light irradiation. Red and blue light resulted in higher levels of PMFs during exposure periods. The accumulation of PMFs was also significantly induced after white light, UVB and UVC irradiation were removed. Red and UVC irradiation induced the accumulation of flavone and flavanone glycosides throughout the entire experimental period. Single light induced limonoid accumulation during exposure periods, but limonoid levels decreased significantly when irradiation was removed. Principal component analysis showed a clear correlation between PMFs and white light, between flavonoid glycosides and red light and UVC, and between limonoids and UVC. These results suggest that the accumulation of flavonoids and limonoids in citrus is regulated by light irradiation. White light, red light and UVC irradiation might be a good potential method for improving the nutrition and flavor quality of post-harvest citrus.

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Section: Discussionmentioning

confidence: 99%

LED and UV Light Utilizing Flavonoids and Limonoids to Investigate the Effect of Post-harvest Light Irradiation

Liu¹,

Hu²,

Dong³

et al. 2019

Preprint

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“…Moreover, besides the hyper-sensitive 4 G5/2 → 6 H9/2 electronic-dipole transition at 652 nm, the intensity ratio between it and the 4 G5/2 → 6 H5/2 magnetic-dipole transition (568 nm) is up to 4.9, implying that the central Sm 3þ ion of the complex [Sm(acac)3(5-Br-2,2 0 -bpy)] (2) is located in a site without inversion symmetry [16]. And thus, the complex 2 emits a bright orange-light with the CIE (Commission International De L'Eclairage) chromatic As a reference compound, the Gd 3þ -based complex 3 allows the further exploration of the antennae luminescence in the absence of energy transfer, because the Gd 3þ ion has no energy levels below 32000 cm 1 , and therefore cannot accept any energy from the antennae excited state [17]. For the Gd 3þcentered complex 3 in solution at room temperature, it shows the typically ligands-based fluorescence (λem ¼ 394 nm andτ ¼ 1.02 ns) also shown in Fig.…”

Section: Synthesis Characterization and Photo-physical Property Of The Ternary Tris-β-diketonate-ln 3þ Complexes 1-3mentioning

confidence: 99%

Ternary complex [Sm(acac)3(5-Br-2,2′-bpy)] for the solution-processed white polymer light-emitting diode (WPLED)

Liu

Wang

et al. 2020

Optical Materials

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In consideration of the Sm 3þ -centered characteristic orange-light as the ideal color-primary component toward a dichromatic white-light, herein, through the doping of the complex [Sm(acac)3(5-Br-2,2 0 -bpy)] (2; Hacac ¼ acetylacetone; 5-Br-2,2′-bpy ¼ 5-Br-2,2 0 -bipyridine) into the PVK (PVK ¼ poly(N-vinyl-carbazole)) host, the obtained PVK@2 film (10:1, wt/wt) exhibits the straightforward solid-state white-light (ΦPL ¼ 6.7%). Further using the PVK@2 film (10:1; wt/wt) as the emitting layer, its singlecomponent solution-processed WPLED gives the electroluminescent performance (L Max of 360.9 cd/m 2 , η Max c of 1.08 cd/A) satisfactory enough for portable full-color flat displays.

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“…In these applications, QDs are usually in the form of a polymer nanocomposite consisting of QDs embedded in a polymer matrix, which protects them from harsh environments [10][11][12][13]. Among the various types of polymers used in LED applications, silicone-based polymers are frequently used because they exhibit excellent transmittance in visible light, thermal stability, and light-extraction efficiency [14][15][16][17]. When a siliconebased polymer is used as a matrix, however, it is difficult to fabricate highly transparent and luminescent nanocomposites due to the aggregation of QDs and the high curing temperature [18,19].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of highly transparent and luminescent quantum dot/polymer nanocomposite for light emitting diode using amphiphilic polymer-modified quantum dots

Yoon

Yang

Kim

et al. 2020

Chemical Engineering Journal

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CdSe@ZnS/ZnS core/shell QDs were encapsulated by an amphiphilic polymer.•QD/PDMS nanocomposite was fabricated by using encapsulated QDs as a crosslinker.•Nanocomposite with uniform QD dispersion could be obtained even at high QD loading.•Synthesized nanocomposite showed high transparency due to uniform QD dispersion.•LED with the synthesized nanocomposite exhibited excellent luminous efficacy.

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Characterization of dents and grooves on polymer films using scanning white light interferometry

Cited by 14 publications

References 20 publications

LED and UV Light Utilizing Flavonoids and Limonoids to Investigate the Effect of Post-harvest Light Irradiation

LED and UV Light Utilizing Flavonoids and Limonoids to Investigate the Effect of Post-harvest Light Irradiation

Ternary complex [Sm(acac)3(5-Br-2,2′-bpy)] for the solution-processed white polymer light-emitting diode (WPLED)

Fabrication of highly transparent and luminescent quantum dot/polymer nanocomposite for light emitting diode using amphiphilic polymer-modified quantum dots

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