Growth of gold nanoparticles using aluminum template via low-temperature hydrothermal method for memory applications

Abstract

Gold nanoparticles (AuNPs) were grown on a Si(100) substrate using a sacrificial hydrothermal method on Al template prepared by direct current (DC) sputtering, followed by thermal annealing. The effect of annealing temperature on the Al template was investigated. The morphology and phases of the grown AuNPs were observed by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. FESEM and XRD results revealed the uniform face-centered cubic structure of AuNPs with isolated 83 nm particle size and 1.48 9 10 13 m -2 area density; these properties were considered optimum for AuNPs formed on the nonannealed sputtered Al template. The electrical properties of AuNPs embedded in polymethylsilsesquioxane (PMSSQ) as an organic dielectric layer were studied using a semiconductor characterization system. A metal-insulatorsemiconductor device with embedded AuNPs was proven to exhibit memory effects. Optimum memory properties of AuNPs embedded in PMSSQ were obtained for AuNPs grown on the non-annealed sputtered Al template with the lowest threshold voltage of 2.4 V in I-V characteristics and 34 electrons stored per AuNP in C-V measurement.

The crystallinity of poly(butylene terephthalate) in mass‐scale extrusion products as seen by differential scanning calorimetry

“…Additional apparent peaks with maxima at around 2 θ = 38.4°, 44.6° were found from fitting residuals and introduced for deconvolution. These two sharp profiles (of FWHM = ~0.20°) were also found in scans of empty holder and assigned to aluminum bracket holder according to the literature 53,54 . The same set of pre‐defined peak pattern was used for deconvolution of WAXS diffractograms of the samples A to C. Two peaks from aluminum bracket holder were excluded from each data set before calculation of crystallinity index.…”

Effect of Template Deposition Method on Formation of AuNPs in Memory Devices Application

“…This method gives advantages of ease of handling and the size and shape of AuNPs can be varied by tuning the parameter such as template type, duration of hydrothermal and concentration of precursors. AuNPs can be grown not only on a ZnO template but also on an Al template by using the sacrificial hydrothermal method [16].…”

“…During sacrificial hydrothermal reaction, AuNPs nucleate on Al grain boundaries with high surface energy sites. The effect of annealing temperature for the Al template on AuNP formation was investigated [16]. The grain size of Al templates increases with increasing annealing temperature because of ion diffusion.…”

CdSe quantum dot/AlOx based non-volatile resistive memory

“…It is worth to mention that electrical bistability have been observed in devices with a thin metal layer embedded between organic layers [6][7][8][9][10]. Nanoparticles and quantum dots are of interest due to their potential application in next generation logic devices [11][12][13]. If memory devices can be fabricated exploiting charge trapping/de-trapping in semiconducting quantum dots [14][15][16], it could lead to miniaturization and large scale integrated circuit devices.…”