Microstructure and optical properties of Ag/ITO/Ag multilayer films

Sun, Zhaoqi; Zhang, Maocui; Xia, Qiping; He, Gang; Song, Xiaoguo

doi:10.1186/1556-276x-8-424

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Thus, it is not the ohmic losses due to electron scattering in silver but the temperature-independent morphology of the silver surface that decides on losses due to scattering into free space [ 2 ]. The above conclusion is in agreement with recently observed maxima in the visible range of the transmittance spectra of Ag/MgF 2 /Ag [ 11 ], Ag/ITO/Ag [ 12 ], and ZnO/Ag/ZnO [ 13 ] multilayers, which clearly depend on Ag surface morphology.…”

Section: Introductionsupporting

confidence: 92%

Optimum deposition conditions of ultrasmooth silver nanolayers

et al. 2014

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Reduction of surface plasmon-polariton losses due to their scattering on metal surface roughness still remains a challenge in the fabrication of plasmonic devices for nanooptics. To achieve smooth silver films, we study the dependence of surface roughness on the evaporation temperature in a physical vapor deposition process. At the deposition temperature range 90 to 500 K, the mismatch of thermal expansion coefficients of Ag, Ge wetting layer, and sapphire substrate does not deteriorate the metal surface. To avoid ice crystal formation on substrates, the working temperature of the whole physical vapor deposition process should exceed that of the sublimation at the evaporation pressure range. At optimum room temperature, the root-mean-square (RMS) surface roughness was successfully reduced to 0.2 nm for a 10-nm Ag layer on sapphire substrate with a 1-nm germanium wetting interlayer. Silver layers of 10- and 30-nm thickness were examined using an atomic force microscope (AFM), X-ray reflectometry (XRR), and two-dimensional X-ray diffraction (XRD2).PACS63.22.Np Layered systems; 68. Surfaces and interfaces; thin films and nanosystems (structure and nonelectronic properties); 81.07.-b Nanoscale materials and structures: fabrication and characterization

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Section: Introductionsupporting

confidence: 92%

Optimum deposition conditions of ultrasmooth silver nanolayers

et al. 2014

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“…Figure 2a displays the X-ray diffraction (XRD) spectra of the Ag-NTF electrodes deposited at 3.0 V. The observed spectra clearly confirmed the cubic facecentered (FCC) phase of Ag-NTF electrodes (JCPDS card # 04−0783). 31 In addition to these peaks, peaks for ITO are also found in the XRD patterns (JCPDS card # 76−1463). No other impurities are observed in the XRD patterns.…”

Section: Structural and Morphologicalmentioning

confidence: 99%

“…Scherrer's equation was taken into consideration to calculate the mean crystallite size, and it was found to be 17 nm. 31 Figure 2b,c shows the optical and field emission scanning electron microscopy (FESEM) images of the Ag-NTF electrode fabricated at 3.0 V. A continuous and uniform film structure is easily visible here. The crystallite size indicates the nanocrystalline nature of the film.…”

Section: Structural and Morphologicalmentioning

confidence: 99%

3D-Printed Nanoscale-Thick Silver Thin Films for Electrochemical Sensing

Singh

Siddiqui

Goswami

et al. 2023

ACS Appl. Nano Mater.

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Nanoscale-thick silver thin films (Ag-NTF) on indium tin oxide-coated glasses are fabricated at different deposition potentials (1.0−5.0 V) using an electrochemical threedimensional (3D) printing process. The printing process is carried out using a nozzle with a diameter of 0.25 mm and a printing speed of 1.0 mm s −1 . The X-ray diffraction (XRD) data showed that the mean crystallite size of Ag is 17 nm. The optical and field emission scanning electron microscopy (FESEM) data revealed the uniform NTF nature of the Ag-NTF electrode. Transmission electron microscopy (TEM) data showed that Ag-NTF electrode particles have a spherical shape with an average size of 21 nm. Furthermore, electrochemical surface activity study showed that samples deposited at 3.0 V have the best electrochemical activity, and hence, the same are used to develop hydrogen peroxide sensors. The sensing measurements are done using a 0.1 M phosphate buffer saline (PBS) electrolyte. The sensitivity of the Ag-NTF comes out to be 25 ± 1 μA mM −1 cm −2 with a lower detection limit (LOD) of 1.0 μM. The selectivity of the electrode is tested using various interfering chemicals. The developed sensors showed excellent selectivity toward H 2 O 2 . Finally, the applicability of the Ag-NTF electrodes toward real-life samples is shown using bovine albumin serum (BSA) and rainwater. For the first time, this study has demonstrated the use of an electrochemical 3D printing process to fabricate electrodes for H 2 O 2 sensing. The inherent nature of the process has the capability to eliminate the conventional tedious route to make such electrodes and to provide a one-step and efficient solution.

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