Wide band gap of Strontium doped Hafnium oxide nanoparticles for opto-electronic device applications – Synthesis and characterization

Manikantan, J; Ramalingam, H.B.; Shekar, B. Chandar; Murugan, Baranya; Kumar, Rajesh; Santhoshi, J. Sai

doi:10.1016/j.matlet.2016.08.026

Cited by 13 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This research effort was geared toward NP application in complementary metal-oxidesemiconductor transistors. 15 Manikantan et al 65 used coprecipitation to prepare strontium-doped hafnium oxide NPs for optoelectronic device applications. In this synthesis strontium hydroxide hydrate was added dropwise to HfCl 4 in aqueous solution and was allowed to stir for 5 h. Subsequent dropwise addition of ammonia induced precipitation of strontium-doped hafnium hydroxide that was then washed and calcinated.…”

Section: Nanoparticle Synthesismentioning

confidence: 99%

Synthesis and Bioapplication of Emerging Nanomaterials of Hafnium

Skrodzki,

Molinaro,

Brown

et al. 2024

ACS Nano

View full text Add to dashboard Cite

A significant amount of progress in nanotechnology has been made due to the development of engineered nanoparticles. The use of metallic nanoparticles for various biomedical applications has been extensively investigated. Biomedical research is highly focused on them because of their inert nature, nanoscale structure, and similar size to many biological molecules. The intrinsic characteristics of these particles, including electronic, optical, physicochemical, and surface plasmon resonance, that can be altered by altering their size, shape, environment, aspect ratio, ease of synthesis, and functionalization properties, have led to numerous biomedical applications. Targeted drug delivery, sensing, photothermal and photodynamic therapy, and imaging are some of these. The promising clinical results of NBTXR3, a high-Z radiosensitizing nanomaterial derived from hafnium, have demonstrated translational potential of this metal. This radiosensitization approach leverages the dependence of energy attenuation on atomic number to enhance energy−matter interactions conducive to radiation therapy. High-Z nanoparticle localization in tumor issue differentially increases the effect of ionizing radiation on cancer cells versus nearby healthy ones and mitigates adverse effects by reducing the overall radiation burden. This principle enables material multifunctionality as contrast agents in X-ray-based imaging. The physiochemical properties of hafnium (Z = 72) are particularly advantageous for these applications. A well-placed K-edge absorption energy and high mass attenuation coefficient compared to elements in human tissue across clinical energy ranges leads to significant attenuation. Chemical reactivity allows for variety in nanoparticle synthesis, composition, and functionalization. Nanoparticles such as hafnium oxide exhibit excellent biocompatibility due to physiochemical inertness prior to incidence with ionizing radiation. Additionally, the optical and electronic properties are applicable in biosensing, optical component coatings, and semiconductors. The wide interest has prompted extensive research in design and synthesis to facilitate property fine-tuning. This review summarizes synthetic methods for hafnium-based nanomaterials and applications in therapy, imaging, and biosensing with a mechanistic focus. A discussion and future perspective section highlights clinical progress and elaborates on current challenges. By focusing on factors impacting applicational effectiveness and examining limitations this review aims to support researchers and expedite clinical translation of future hafnium-based nanomedicine.

show abstract

Section: Nanoparticle Synthesismentioning

confidence: 99%

Synthesis and Bioapplication of Emerging Nanomaterials of Hafnium

Skrodzki,

Molinaro,

Brown

et al. 2024

ACS Nano

View full text Add to dashboard Cite

show abstract

“…131), (003) orientation planes respectively, which indicates the hexagonal structure of the CaP-CS NC and it is in close agreement with the standard JCPDS file no 82-0807 which in turn implies that the prepared sample was free from impurities. The crystallite size of CaP-CS NC was estimated using Scherrer's formula (Manikantan et al 2017). Table 1 shows the estimated structural characteristic of CaP-CS NC.…”

Section: Xrdmentioning

confidence: 99%

Characterization of Calcium Phosphate Chitosan Nanocomposite as Plant Growth Promoter

Niranjana¹,

Mathankumar²,

Dhanabalan³

et al. 2022

J Exp Bio & Ag Sci

Self Cite

View full text Add to dashboard Cite

In this study, calcium phosphate-chitosan nanocomposite (CaP-CS NC) was prepared by a convenient and affordable co-precipitation method, and the prepared NC was tested for agriculture application. Physico-chemicals analyses of the CaP-CS NC were conducted by X-ray diffraction (XRD), scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible spectroscopy (UV-Vis) instruments to determine the structural characteristics, surface topology, chemical composition, function group, and optical properties. The XRD pattern of CaP-CS NC revealed that the average crystallite size was 43 nm. The SEM images showed agglomeration of the CaP-CS NC with a rod-like shape. The EDS spectrum of the CaP-CS NC indicated the presence of Ca, P, O, and N elements. FTIR displayed vibrational peaks for the active functional group such as carboxylic (C=O), amines (N-H), hydroxyl (O-H), and alkyne (C-H). Furthermore, the spectrum of CaP-CS NC showed the bending mode of phosphates at 588.37 cm-1 and 508.45 cm-1. The UV-Vis-NIR spectrum of the prepared nanocomposite indicates the anti-reflection properties, which might be useful in solar cell applications to increase the efficiency of the solar cell. In addition, the prepared CaP-CS NC was tested for the plant growth stimulator properties at the lab scale level, wherein it exhibited substantial growth. Accordingly, the current study suggests that the prepared CaP-CS NC could be used as a plant growth promoter.

show abstract

“…Karmaoui, et al prepared ultrafine strontium hafnium oxide (SrHfO 3 ) nanoparticles of 2.5 nm in size and demonstrated its potential as high-k gate dielectrics [110]. These perovskite-types, strontium-doped or mixed hafnium oxides with other metal oxides recently gained much interest because of exhibiting ferroelectric behavior and ultimately utilized in optoelectronic device applications [111][112][113][114]. The dielectric constant reported by Karmaoui, et al was 17.0 and a relatively large capacitance value of 9.5 nF cm −2 [110].…”

Section: High-k Dielectric Nanoparticlesmentioning

confidence: 99%

High-k Polymer Nanocomposite Materials for Technological Applications

Shimoga

Kim

2020

Applied Sciences

View full text Add to dashboard Cite

Understanding the properties of small molecules or monomers is decidedly important. The efforts of synthetic chemists and material engineers must be appreciated because of their knowledge of how utilize the properties of synthetic fragments in constructing long-chain macromolecules. Scientists active in this area of macromolecular science have shared their knowledge of catalysts, monomers and a variety of designed nanoparticles in synthetic techniques that create all sorts of nanocomposite polymer stuffs. Such materials are now an integral part of the contemporary world. Polymer nanocomposites with high dielectric constant (high-k) properties are widely applicable in the technological sectors including gate dielectrics, actuators, infrared detectors, tunable capacitors, electro optic devices, organic field-effect transistors (OFETs), and sensors. In this short colloquy, we provided an overview of a few remarkable high-k polymer nanocomposites of material science interest from recent decades.

show abstract

Wide band gap of Strontium doped Hafnium oxide nanoparticles for opto-electronic device applications – Synthesis and characterization

Cited by 13 publications

References 15 publications

Synthesis and Bioapplication of Emerging Nanomaterials of Hafnium

Synthesis and Bioapplication of Emerging Nanomaterials of Hafnium

Characterization of Calcium Phosphate Chitosan Nanocomposite as Plant Growth Promoter

High-k Polymer Nanocomposite Materials for Technological Applications

Contact Info

Product

Resources

About