Dopant Variation Research Articles

Optimizing luminescent properties of ZnO: Er3+ through temperature and dopant variation: XRD and emission spectroscopy studies

This study focuses on optimizing the synthesis conditions for the luminescent properties of ZnO:Er3[Formula: see text], a key step toward improving its applicability in optoelectronics. X-ray diffraction (XRD) patterns at [Formula: see text]C with Er3[Formula: see text] dopant concentrations (1, 3 and 5[Formula: see text]wt.%) show the preservation of the crystalline phase of ZnO, indicating that the dopants did not affect the structural integrity. Luminescence properties were observed in ZnO with 1[Formula: see text]wt.% erbium doping at 900–[Formula: see text]C, with the sample at [Formula: see text]C exhibiting the highest emission peak at 533[Formula: see text]nm. The optimal conditions for significant luminescence were identified at [Formula: see text]C, with 5[Formula: see text]wt.% Er3[Formula: see text] showing the most pronounced effect. The practical implications of the achievement of optimal luminescence in ZnO:Er3[Formula: see text] are profound for optoelectronics. These conditions are critical for efficient light-emitting devices, particularly in applications such as light-emitting diodes (LEDs) and lasers, where emission characteristics have a direct impact on performance. In addition, the enhanced luminescence holds great promise for sensors, especially in biomedical and environmental monitoring, as well as in quantum technologies. It contributes to the advancement of quantum sensors and quantum computing applications. This research provides a basis for tailoring the properties of ZnO:Er3[Formula: see text] for specific applications by identifying optimal luminescence conditions at different dopant concentrations. While the identification of optimal conditions has been successful, further research is essential to unravel the underlying mechanisms at the atomic and molecular levels. Overcoming these challenges and exploring additional applications will be critical to realizing the practical impact of these findings in various technological fields, as the study paves the way for advances in optoelectronics, sensing, and quantum information processing.

Autothermal Oxidative Coupling of Methane over Pt/Al2O3 Catalysts Doped with Rare Earth Oxides

AbstractThe effect of rare earth oxides as dopants on the Pt‐governed oxidative coupling of methane (Pt‐OCM) is investigated. The addition of 20 wt.‐% of La‐, Nd‐, Sm‐, and Pr‐oxides to the support benefits the C2 product selectivity and offers the potential to enhance the catalyst stability. Compared to the reference catalyst Pt/Al2O3, the addition of Sm2O3 increased the total selectivity by up to 23 %. Furthermore, La2O3 addition was found beneficial with respect to the (thermal) stability of the catalyst. Dopant content variations uncovered that the catalyst formulation with 20 wt.‐% La2O3 represents an optimum regarding performance and stability.

Synthesis and investigation; influence of Mn doping on biological, optical, dielectric and electrochemical characteristics of Bi2O4 nanostructures

In this research, bismuth oxide thin films were synthesized with the variation of Mn dopant (1-5 wt %) on a glass slide by sol-gel dip coating method. XRD corroborated the creation of a monoclinic phase for all the samples after annealing at 450 °C for 4 h. The non-uniform cuboid-like granular structures were observed by SEM with a significant number of grain boundaries. Different functional groups were examined by using FTIR spectroscopy. The optical band gap was reduced from 2.01 to 1.81eV by increasing the concentration of Mn dopant. The contribution of grain and grain boundaries to the material electrical response in various frequency ranges was distinguished by impedance analysis. The polaron mechanism was used to investigate conductivity with time variation. The efficiency of supercapacitors was significantly enhanced by using the monoclinic Bi2O4 phase of bismuth oxides, promoting the specific capacitance in the range of 2518.2–6890.2 Fg-1 with high energy and power density. That leads them to the fabrication of supercapacitors in advanced electronic devices. Magnetic analysis showed that saturation magnetization and remanent frequency decreased while coercivity of thin films increased with increasing Mn concentration which was successfully explained by the critical size effect and Néel's collinear two sub-lattice models, making them plausible candidates in spintronics. As from photocatalyst analysis, the number of reactive oxygen species ROS was increased by increasing Mn doping in the Bi2O4 crystal lattice. These species degraded the water pollutants under simple exposure to sunlight (i-e visible range). The production of ROS in the photocatalytic process was also correlated with antibacterial activity. Mn-doped Bi2O4 was found to be more effective towards K. pneumonia than other bacteria. The prepared Mn:Bi2O4 nanostructures with a higher percentage of manganese were effectively used for the treatment of bloodstream infections, meningitis, pneumonia, and urinary tract infections and stopped further bacterial growth.

Flexoelectric aging effect in ferroelectric materials

In spite of the flexoelectric effect being a universal phenomenon in the ferroelectric perovskites, the current understanding of flexoelectric aging in ferroelectrics is, actually, rather incomplete. In this paper, we have fabricated a series of Mn-doped BaTiO3 perovskite ceramics (BaTi1–xMnxO3, x = 0.1% and 1%, BTMO) to systematically investigate the corresponding flexoelectric aging behavior by controlling the concentration of Mn. We found that the variation of Mn dopant significantly effects the Curie temperature, dielectric constant, flexoelectric aging, and flexoelectric coefficient of the BTMO ceramics. Especially for the BTMO (0.1%) ceramics, obvious ferroelectric aging and flexoelectric aging phenomenon are observed at room temperature. The main reason for aging of BTMO ceramics is that the doping of Mn introduces oxygen vacancies, which tend to be stable under the action of strain gradient and electric field. Therefore, the results presented in this paper verify that the flexoelectric aging in Mn-doped BTO ceramics is closely related to ferroelectric fatigue.

SYNTHESIS AND CHARACTERIZATION NOVEL EMERALDINE-SALT@PORANGCOMPOSITES THIN FILM:CONDUCTIVITY STUDIES

A synthesis of the emeraldine salt@porangcomposite was synthesized using the in situ chemical polymerization method to form the ES@Porang composite. Polymerization using ammonium peroxodisulphate as an initiator in the aniline oxidative polymerization process and using H2SO4 doping. The composite films were prepared with variations in dopant concentration and variations in the amount of glucomannan. Characterization of the ES@Porang composite using FTIR and conductivity testing using an LCR-meter. The optimum conductivity values ​​of the ES@Porangcomposite thin film with variations in dopant concentration and amount of glucomannan were 24.3 x 10-3, 58.2 x 10-3, and 84,3 x 10-3 S/cm respectively.

“Magnetic Ni–Zn ferrite anchored on g-C3N4 as nano-photocatalyst for efficient photo-degradation of doxycycline from water”

In the present work, mixed-spinel ferrite anchored onto graphitic carbon nitride (GCN) was synthesized for mineralization of antibiotic pollutant from waste water. A Z-scheme g-C3N4/Ni0.5Zn0.5Fe2O4 nano heterojunction was fabricated by three step procedure: pyrolysis, solution combustion and mechanical grinding followed by annealing. The prepared photocatlyst was tested for degradation of Doxycycline (DC) drug under the natural sun light. Results revealed that the prepared heterojunction has maximum degradation efficiency of 97.10% pollutant in 60 min experiment. The Z-scheme heterojunction between g-C3N4 and Ni–Zn ferrite improves the photoinduced charges separation and protection of redox capability and therby increases the photo degradation efficiency. The scavenging experiments suggested that O2−● and h+ as main active species responsible for degradation of the antibiotic. In addition, the dopant variation can drive the shists in band gap and energy band positiong too which makes then excellent candidates for synthesizing tunable heterostructures with organic semiconductors. The work focusses on designing and developing of saimpler but efficient magnetic heterojunctions with superior redox capability for solar powered waste water treatment.

Facile Hydrothermal Synthesis of Tin Doped Copper Bismuthate for the Real Time Electrochemical Determination of Chloramphenicol in Real Samples

In the present work, we investigated a one-step hydrothermal synthesis of copper bismuthate (CBO) and Sn doped (SCBO). The properties of CBO have been enriched by doping of Sn, which has been inclined to modify screen printed carbon electrode for the electrochemical determination of chloramphenicol (CMP). The dopant Sn with CBO was varied [(SCBO-1), (SCBO-5), (SCBO-10)] with comparison analysis done to choose highly conducting composite. The doping of Sn over CBO is highly a new strategy in detecting CMP which showed improved electrical conductivity with the dopant variation. Among, the different dopant variations, SCBO-5 demonstrated enhanced electrochemical response towards CMP when compared with the other dopant variations. Highly enriched actives sites at SCBO-5/SPCE resulted with a low detection limit of 0.007 μM and a sensitivity about 5.7 μAμM−1cm−2 with linear range of 0.09 μM to 475.73 μM. The decrease in particle size with improved surface area deliberately influenced the detection range and the sensitivity with improved electrochemical performances. The fabricated hybrid material with cost effective materials is highly significant over other high cost preparation materials. The substitution of Sn substantially increases both the electrical conductivity and electro catalytic activity of CBO which is strongly agreed by the electrochemical performance.

Reduction of Random Dopant Fluctuation-induced Variation in Junctionless FinFETs via Negative Capacitance Effect

In this study, we investigated the impact of random dopant fluctuation (RDF) on junctionless (JL) fin field-effect transistors (FinFETs) with ferroelectric (FE) negative capacitance (NC) effect. The RDF-induced variations were captured by using built-in Sano methodology in three-dimensional technology computer-aided design (TCAD) simulation. Compared to the regular JL-FinFETs, the variations in JL-FinFETs with NC effect (NCJL-FinFETs) was observed to be less via statistical Monte Carlo analysis, which further enhanced its performance as well. The evaluation and estimation of threshold voltage (V T ), ON-state current (I on ), OFF-state current (I off ), and subthreshold swing (SS) by different FE layer thicknesses indicated reduction in the standard deviations of V T (δV T ) and I on (δI on ) by 34.7% and 7.08%, respectively; the OFF-state current and its standard deviation shrank by approximately three orders of magnitude than the JL-FinFET counterpart. Although δSS was not monotonous, the SS was significantly improved to sub-60 mV/decade. To sum up, the regular JL-FinFETs containing the FE layer as NC effect not only improved the electrical performance, but also led to the resilience of the RDF-induced statistical variability.

The Variation Effect of Mg-doped NPs Prepared by Sol-Gel Method on its Structural Properties and Biological Activities

In this paper, we reported the synthesis of NiO NPs and Mg doped-NiO NPs using the facile sol-gel method. Besides, the influence of the variation of Mg dopant on the structural, morphological and optical properties of the prepared Mg-NiO NPs was studied. The synthesized Mg-NiO NPs nanoparticles were characterized by X-Ray Diffraction Analysis (XRD), Energy Dispersive X-ray Spectroscopy (EDS), Fourier-Transform Infrared Spectroscopy (FTIR), Field-Emission Scanning Electron Microscopy (FE-SEM), and UV-Vis spectrophotometer. The X-ray diffraction confirmed the formation of the cubic structure of Mg doped-NiO NPs after doping with the magnesium. The increase in the crystal size was observed with the increase in the concentration of the Mg dopant element. The FESEM images reveal the formation of nickel oxide through the appearance of spherical clusters, while the hybrids appear as wrinkled surface covered with spherical particles of magnesium. The UV-Vis spectrum showed a shift towards shorter wavelengths with an increase in the concentration of the Mg dopant element due to the quantum confinement effect. The hemolysis activity study showed that NiO NPs had a low hemolysis percentage of 1.47% and increased with increasing concentration. While, increasing of the RBC hemolysis (5.9%) after NiO doped with Mg. The antibacterial activity was studied against S. aureus and P. aeruginosa bacteria, and indicated the highest growth inhibition zones of Mg-doped NiO NPs as compared with NiO NPs against of Staphylococcus aureus and Pseudomonas aeruginosa, respectively.

Ferroelectricity of pure HfOx in metal-ferroelectric-insulator-semiconductor stacks and its memory application

Ferroelectricity in hafnium oxide (HfOx) and its various applications have been rigorously investigated in recent years. In particular, most studies have focused on a non-centrosymmetric ferroelectric phase that is developed via the injection of external ions into HfOx. However, the drawbacks of doped HfOx, such as serious dopant variation and thermal instability, have hindered its commercialization in low-power logic and memory applications. In this study, we demonstrated the ferroelectricity of pure HfOx without additional ion doping in metal-ferroelectric-insulator-semiconductor (MFIS) stacks. We experimentally confirmed that variation-resistant and thermally stable ferroelectric pure HfOx could be achieved with remarkable polarization by controlling the oxygen vacancies inside pure HfOx and the thermal quenching process for orthorhombic phase transition. Furthermore, to verify the feasibility of the ferroelectric pure HfOx in memory devices, the modulation of tunneling resistance was measured using MFIS ferroelectric tunnel junction (FTJ) devices, revealing that the tunneling current was adjustable over a 2-order current range via the polarization of the pure HfOx, implying that multiple current states could be obtained for multilevel memory operations.

Sintesis Soluble Polianilin dengan Variasi Jenis dan Konsentrasi Dopan

This study reports the synthesis of soluble polyaniline by the oxidation polymerization method with various dopants HCl, H2SO4, and Fumaric acid (FA). This dopant variation is carried out to obtain polyaniline with optimum solubility and electrical conductivity. The results of FTIR characterization showed several characteristic polyaniline bonds from the samples that had been synthesized. PANi/FA with a concentration of 1M has the best solubility compared to PANi/HCl and PANi/H 2 SO 4 , with a solubility value of 5.7% in NMP solvents. The electrical conductivity of all samples was measured by the two-point probe method. PANi / HCl with a concentration of 1M has the best conductivity than PANi/FA and PANi/H 2 SO 4 with a value of 48 x10 -4 S/cm. The morphology of the oxidized polyaniline powder was observed using SEM. SEM results showed the morphology of polyaniline in the form of an interconnected sponge.

Microstructure features of the BST/(Mg, Ln)-ceramic

Solid solutions of the composition Ba[Formula: see text](Mg, Ln)[Formula: see text][Formula: see text]TiO3 ([Formula: see text] = 0.01; 0.025; 0.04; [Formula: see text] = 0.20; 0.50; 0.80; Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tu, Yb) were prepared by two-stage solid-phase synthesis followed by sintering using conventional ceramic technology. The influence of rare-earth elements on the microstructure of the prepared ceramic samples was investigated. It was found that regardless of the type of modifiers introduced, the grain landscape of the studied solid solutions with different amounts of SrTiO3 is refined (in the initial system, the average grain size, [Formula: see text], at [Formula: see text] = 0.20 is 6 [Formula: see text]m; at [Formula: see text] = 0.50 is 4 [Formula: see text]m; at [Formula: see text] = 0.80 is 18 [Formula: see text]m) to crystallite sizes not exceeding (2-3) [Formula: see text]m, and compacted. The using of mechanical activation procedures leads to an even greater decrease in the size and an increase in the density of ceramics. The increasing in the concentration of modifiers in each group (within the considered range of dopant variation) against the background of such a fine-grained structure has little effect on the dynamics of changes in [Formula: see text]. It is concluded that it is advisable to use the data obtained in the development of functional materials based on BST/(Mg, Ln) and devices with the participation of these compositions.

Electrospun Polycaprolactone Nanofibrous Webs Containing Cu–Magnetite/Graphene Oxide for Cell Viability, Antibacterial Performance, and Dye Decolorization from Aqueous Solutions

Fine powder of magnetite nanoparticles (MNPs) was doped with different contents of copper (Cu) through a mat of graphene oxide (GO) nanosheets. These compositions were incorporated into electrospun nanofibrous membranes of polycaprolactone (PCL). Mechanical properties were measured, and examining the ability of these nanofiber membranes to remove methylene blue (MB) dyes from aqueous solutions was also assessed. TEM of the resulting nanofibers has a diameter of the order of 300 nm. Moreover, the morphological features of membranes showed that diameters were varied upon the variation of dopant (Cu ions) starting from 0.35–1.06 μm and 1.8–3.9 μm at no Cu reaching 0.19–0.45 μm and 0.75–1.42 μm for the highest contribution of Cu, whereas GO scattered grains of 0.56–1.5 μm were detected. The tensile strength was changed accordingly and reached around 8.96 ± 0.45 MPa, while the toughness achieved 4.69 ± 0.29 MJ/m3 at the highest additional dopant. The designed nanofibrous membrane was able to remove 95.1% MB after 36 min of continuous exposure, while the reusability indicated that the composition was stable after 5 times of removal with efficiency around 90.1% for the 0.8Cu–MNPs–GO@PCL. The antibacterial efficiency was also investigated against both E.coli and S. aureus, and the inhibition zone recorded around 11.4 ± 1.5 and 11.1 ± 1.7 mm in dark and 15.6 ± 2.1 and 13.6 ± 1.8 mm, respectively, at the highest contribution of Cu dopant. This behavior of the manipulated nanofibrous membrane indicates that tailoring of multi-functional nanomaterials could be reached via designing scaffold-based electrospun technique.

Process Variation-Induced Contact Resistivity Variability in Nanoscale MS and MIS Contacts

This article presents contact resistivity variability (CRV) in metal-semiconductor (MS) and metal-interfacial layer (IL)-semiconductor (MIS) contacts on Ge and Si source/drain regions resulting from process-induced random dopant fluctuation (RDF) and IL thickness variation (ILTV). CRV is modeled by combining the effect of RDF and ILTV in statistical simulations incorporating Fermi-level pinning physics. CRV is also shown to have a direct and significant impact on 7-nm FinFET On-current variability. The choice of contact architecture depends strongly on the source/drain doping. RDF dominates at low doping and MIS contacts provide lower CRV as well as lower resistivity ( $\rho _{c}$ ) due to a lower contact barrier height. Impact of RDF decreases and that of ILTV increases with increasing doping resulting in lower CRV with comparable $\rho _{c}$ for MS contacts.

Optical and structural properties of tungsten-doped barium strontium titanate

The effect of variation in the tungsten content on the tungsten doped barium strontium titanate for their use in DSSC is studied. Samples were prepared by solid state reaction for the dopant variation of x = 0, 0.2, 0.4 and 0.6. The characterization of optical properties was performed by UV–Vis spectrometer by diffused reflectance Method to find the optical band gab and microstructural characterization was performed by X-ray diffraction (XRD) and the FESEM reveals the morphology of the samples prepared. Tungsten doped barium strontium titanate shows good variation in the morphology and the structure.

Investigation of dopant effect on the electrochemical performance of 1-D polypyrrole nanofibers based glucose biosensor

Glucose plays an imperative role in human metabolism and any imbalance in glucose concentration can cause chronic disease like diabetes mellitus. With the drastic increase in the number of diabetic patients around the world, demand for point of care testing device for continuous monitoring of blood glucose level has been accelerated. In this respect, electrochemical glucose biosensors play a vital role for measurement of glucose concentration in human blood. In this work, for the first time, we demonstrate a systematic study of the effect of two different types of dopants viz. lithium perchlorate (LiClO4) and para-toluenesulfonic acid (p-TSA) on the performance of polypyrrole (PPy) based enzymatic glucose biosensor. Both the dopants (LiClO4 and p-TSA) were utilized with the aim of improving the charge transfer capability of PPy films. The PPy nanofibers were synthesized over a Platinum coated glass substrate by electrochemical method. The morphological and electrochemical properties of electrosynthesized PPy nanofibers utilizing template-free method have been tailored by dopant variation (LiClO4 and pTSA) during electropolymerization. The as-prepared PPy nanofibers were used as a support matrix for enzyme immobilization. The as-fabricated enzymatic biosensors were later examined for the detection of glucose. Both the morphological and electrochemical properties of PPy electrode have been observed to improve with p-TSA (PPy–pTSA), as compared to LiClO4 (PPy–LiClO4). The as-fabricated PPy–pTSA/GOx based glucose biosensor has exhibited the highest sensitivity of 6.12 mA cm−2 M−1 with a linear range of 0.1–7.5 mM, which is better as compared to PPy-LiClO4/GOx biosensor. Additionally, the as-prepared PPy–pTSA/GOx biosensor has presented noteworthy stability, selectivity, and reproducibility that validates the importance of the dopant effect in electrosynthesized PPy based biosensing applications.

Electro-Catalytic Behavior of Mg-Doped ZnO Nano-Flakes for Oxidation of Anti-Inflammatory Drug

A novel electrochemical carbon paste sensor containing 10% magnesium doped with zinc oxide nanoparticles was developed and used for electrochemical detection of an anti-inflammatory drug, mefenamic acid. The electrode materials were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray powder diffraction. Electrochemical and square wave voltammetric techniques were employed to find the lowest possible limit of detection to quantify mefenamic acid. Analytical experiments were performed over the pH range of 3.0–11.2. The pH 7.0 was found to be suitable for the analysis in real samples of human urine as well as a pharmaceutical dosage form. The present work was compared with our early findings based on barium zinc oxide modified glassy carbon electrode to understand the effect of variation of dopant. The results suggested that the dopant significantly affected the electrochemical determination of the analyte and better results were obtained with the modified electrode.

Dopant Variation as a Probe into the Antimicrobial activity of Polyaniline/Carbon nanofiber/Poly(methylmethacrylate) Composite

AbstractPolymeric composites based on polymethylmethacrylate (PMMA), carbon nanofiber (CNF) and polyaniline (PANI) were prepared and the effect of various dopants on the morphology and antibacterial property was evaluated. CNF was given a coating of PANI through in situ polymerization method by adding five different acid dopants (hydrochloric acid (HCl), sulphuric acid (H2SO4), phosphoric acid (H3PO4), toluene sulphonic acid (TSA) and camphor sulphonic acid (CSA)) and was used to prepare the composite by solution casting method. The composites were characterized by X‐ray diffraction, FTIR spectroscopy, BET surface area analysis, DLS measurements, SEM and TEM microscopic techniques. Scanning electron micrographs and surface area analysis showed that phosphoric acid doped composite had the smallest average size and highest surface area among other four composites. The activity of the composites against Escherichia coli, Klebsiella pneumoniae and Bacillus subtilis bacteria was evaluated by agar well diffusion method. The antibacterial activity was assessed by measuring the inhibition zone diameter and minimum inhibitory concentration. The composites showed variable toxicity indicating a dependence on the type of doping agent used. A zeta potential value of +39.60 mV was obtained for phosphoric acid doped PANI/CNF composites, indicating its antibacterial property. The results showed that the antibacterial activity of this composites is tunable.

Characteristics of Vanadium Doped And Bamboo Activated Carbon Coated LiFePO4 And Its Performance For Lithium Ion Battery Cathode

Vanadium doped and bamboo activated carbon coated lithium iron phosphate (LiFePO 4 ) used for lithium ion battery cathode has been successfully prepared. Lithium iron phosphate was prepared through a wet chemical method followed by a hydrothermal process from the starting materials of LiOH, NH 4 H 2 PO 4 , and FeSO 4 .7H 2 O. The dopant variations of 0 wt.%, 3 wt.%, 5 wt.%, and 7 wt.% of vanadium and a fixed 3 wt.% of bamboo activated carbon were carried out via a solid-state reaction process each by using NH 4 VO 3 as a source of vanadium and carbon pyrolyzed from bamboo tree, respectively. The characterization was carried out using X-ray Diffraction (XRD) for the phase formed and its crystal structure, Scanning Electron Microscope (SEM) for the surface morphology, Electrochemical Impedance Spectroscopy (EIS) for the conductivity, and battery analyzer for the performance of lithium ion battery cathode. The XRD results show that the phase formed has an olivine based structure with an orthorhombic space group. Morphology examination revealed that the particle agglomeration decreased with the increasing level of vanadium concentrations. Conductivity test showed that the impedance of solid electrolyte interface decreased with the increase of vanadium concentration indicated by increasing conductivity of 1.25 x 10 -5 S/cm, 2.02 x 10 -5 S/cm, 4.37 x 10 -5 S/cm, and 5.69 x 10 -5 S/cm, each for 0 wt.%, 3 wt.%, 5 wt.%, and 7 wt.% vanadium, respectively. Vanadium doping and bamboo activated carbon coating are promising candidate for improving lithium ion battery cathode as the initial charge and discharge capacity at 0.5C for LiFePO 4 /C at 7 wt.% vanadium is in the range of 8.0 mAh/g.

Device- and circuit-level variability due to random discrete dopant in resist- and spacer-defined nanoscale FinFETs

In current CMOS technology, parameter variations are playing a vital role in limiting the benefits of downscaling, especially in the nanodomain. This work presents the investigation of random dopant fluctuation (RDF) in several possible line-edge roughness (LER)-induced fin shapes of spacer- (i.e., correlated LER) and resist- (i.e., uncorrelated LER) defined patterning techniques for a 14-nm FinFET structure. The three-dimensional (3-D) technology computer-aided design simulation on a large statistical ensemble has been carried out to analyze the impact of the RDF on various device parameters such as threshold voltage, drive current, off current, and drain-induced barrier lowering. It is observed that the impact of RDF on electrical parameters mainly depends on the fin shape and is dominant in all resist-defined FinFET structures. It is also found that the impact of RDF can diminish significantly using the spacer-defined patterning technique. Further, the impact of RDF in spacer- and resist-defined FinFET structures has been investigated for noise margins of 6-T static random access memories (SRAM). It is concluded that random dopant variations in SRAM performance offer better immunity in the case of spacer-defined FinFETs compared with resist-defined FinFETs.