Evgeny Zamburg

National University of Singapore | NUS · Department of Electrical & Computer Engineering

Competitive‐learning‐based spiking neural networks are capable of rapid, highly accurate pattern recognition with minimal data through denoising mechanisms provide by adaptive interneuron inhibition. However, hardware implementations of such networks are currently area‐inefficient due to the high device count require to execute dual excitatory‐inhi...

In this article, we demonstrate a low-thermal budget defect-engineered process to achieve top-gated (TG) oxide–semiconductor ferroelectric field-effect transistors (FeFETs). The demonstrated TG FeFETs, with the channel length scaled down to 40 nm, exhibit a highly stabilized ferroelectric memory window (MW) of 2 V and a high current ON/OFF ratio of...

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of...

Photonic neural network has been sought as an alternative solution to surpass the efficiency and speed bottlenecks of electronic neural network. Despite that the integrated Mach–Zehnder Interferometer (MZI) mesh can perform vector-matrix multiplication in photonic neural network, a programmable in-situ nonlinear activation function has not been pro...

Memtransistors that combine the properties of transistor and memristor hold significant promise for in-memory computing. While superior data storage capability is achieved in memtransistors through gate voltage-induced conductance modulation, the lateral device configuration would not only result in high write bias, which compromises the power effi...

Good quality packaging prevents contamination, secures preservation, and increases the ease of transportation in food and medical industries. One particular weakness of the package lies in the seal region where contents can be unintentionally incorporated, which disrupts the sealing process and compromises the structure and durability of the seal....

Realization of high-density and reliable resistive random access memories based on two-dimensional semiconductors is crucial toward their development in next-generation information storage and neuromorphic computing. Here, wafer-scale integration of solution-processed two-dimensional MoS 2 memristor arrays are reported. The MoS 2 memristors achieve...

The recent legalization of cannabidiol (CBD) to treat neurological conditions such as epilepsy has sparked rising interest across global pharmaceuticals and synthetic biology industries to engineer microbes for sustainable synthetic production of medicinal CBD. Since the process involves screening large amounts of samples, the main challenge is oft...

A ferroelectric field-effect transistor (FeFET), capable of logic and memory functionalities in a single device, is a promising three-terminal memtransistor that enables high-performance in-memory computing for non Von Neumann architectures. Among all HfO2-based ferroelectric materials, HfZrO2(HZO) has attracted the most attention due to the low pr...

We proposed an integrated non-volatile optical memory cell using novel analog linear photo-response resistance switch based on 2.5D MoS 2 . It enables a thermally stable and scalable solution for integrated optical memory components. © 2022 The Author(s)

One of the significant limitations of the pulsed laser deposition method in the mass-production-technologies of micro- and nanoelectronic and molecular device electronic fabrication is the issue of ensuring deposition of films with uniform thickness on substrates with large diameter (more than 100 mm) since the area of the laser spot (1-5 mm2) on t...

Untethered computing using deep convolutional neural networks (DCNNs) at the edge of IoT with limited resources requires systems that are exceedingly power and area-efficient. Analog in-memory matrix-matrix multiplications enabled by emerging memories can significantly reduce the energy budget of such systems and result in compact accelerators. In...

Energy conversion devices draw much attention due to their effective usage of energy and resulting decrease in CO2 emissions, which slows down the global warming processes. Fabrication of energy conversion devices based on ferroelectric and piezoelectric lead-free films is complicated due to the difficulties associated with insufficient elaboration...

We experimentally investigated the effect of post-growth annealing on the morphological, structural, and electrophysical parameters of nanocrystalline ZnO films fabricated by pulsed laser deposition. The influence of post-growth annealing modes on the electroforming voltage and the resistive switching effect in ZnO nanocrystalline films is investig...

This paper shows the results of thermodynamic analysis of interfacial interaction in the lithium-niobium-oxygen system. The temperature dependences of the change in the Gibbs free energy calculated, taking into account the non-linear temperature dependences of the thermophysical properties of materials. Additionally, estimated the possibility of di...

3D monolithic integration of logic and memory has been the most sought after solution to surpass the Von Neumann bottleneck, for which a low-temperature processed material system becomes inevitable. Two-dimensional materials, with their excellent electrical properties and low thermal budget are potential candidates. Here, we demonstrate a low-tempe...

Effect of resistive switching in TiO 2 thin film was investigated. It was shown, resistive switching from high resistance state (HRS) to low resistance state (LRS) has occurred at 3.2±0.2 V, and from LRS to HRS at -2.8±0.5 V. Endurance test shown that HRS decreased from 42.31±5.26 kΩ to 26.45±6.14 kΩ, LRS increased from 2.25±1.15 kΩ to 3.45±1.18 kΩ...

Memristor effect in ZnO thin films was investigated. It was shown, that increase in the number of laser pulses during the formation of a thin ZnO film from 1000 to 3000 leads to increase resistance of ZnO film in the high resistance state (HRS) from 28.31±8.27 kΩ to 1943.53±123.11 kΩ and decrease resistance of ZnO film in the low resistance state (...

The results of experimental investigations into the memristor effect and influence of annealing modes on the electrical properties of nanocrystalline zinc-oxide films fabricated by pulsed laser deposition are presented. The possibility of fabricating a nanocrystalline zinc-oxide film by pulsed laser deposition in a broad range of electrical (resist...

Size effect on memristive properties of nanocrystalline ZnO film was investigated. It was shown, ZnO film thickness increase from 6.23±1.54 nm to 47.60±8.12 nm leads to high-resistance state (HRS) increase from 3.26±2.14 MΩ to 700.32±300.83 MΩ and low-resistance state (LRS) from 0.03±0.02 MΩ to 0.09±0.03 MΩ, respectively. The HRS/LRS ratio increase...

This paper shows the results of the study of size effects of electro-physical parameters in nanostructured LiNbO3 thin films fabricated by pulsed laser deposition. Obtained results shown that with an increase in the number of laser pulses from 50 000 to 150 000, the maximum value of the amplitudes (psi) increases from 36 to 47, and phase shift (del...

A resistive switching effect in metal/oxide/metal structures is attractive for resistive random-access memory (RRAM) manufacturing [1]. Resistive switching effect was observed in many oxide film (ZnO, HfO2, TiO2, NiO, Al2O3, SnO2, SiO2, etc.). Mixing of these materials allows to combine their advantages and remedy the disadvantages [2]. Nanocomposi...

A stretchable electrocardiogram (ECG) patch (SEP) that monolithically integrates ECG monitoring chip‐on‐board (COB) with polydimethylsiloxane (PDMS) and liquid‐metal interconnects is presented. The 4.8 × 4.8 cm² SEP is conformal and robust to mechanical deformation. The use of a silicon‐on‐insulator rigid complementary‐metal‐oxide‐semiconductor chi...

An electrical system comprising a circuit of reconfigurable electrical devices and a controller including a processor. The processor has a configuration examiner and a state modifier. The configuration examiner is configured to determine a configuration for the circuit of reconfigurable electrical devices based upon a connection input. The state mo...

An electrical device comprising a reconfigurable integrated circuit that includes paired top electrodes and bottom electrodes separated from each other by an active layer.

The results are presented from studying the effect substrate temperature has on the morphological, electrophysical, and optical parameters of LiNbO3 films obtained via pulsed laser deposition. It is established that films formed at temperatures of 300 to 600°C have a nanocrystalline structure with crystallites predominantly oriented in planes (110)...

The resistive switching effect in ZnxTiyHfzOi nanocomposite film, grown by pulsed laser deposition technique, was investigated. It was shown that ZnxTiyHfzOi film surface had a granular structure with 0.8±0.4 μm² grain size and 7.3±5.1 nm grain height. Resistive switching from high resistance state (HRS) to low resistance state (LRS) was occurred a...

This paper shows the results of studying the influence of target-substrate distance during pulsed laser deposition on electrical properties of LiNbO3 thin films. It has been shown that changing the target-substrate distance we can obtain thin films with a different composition. EDX spectra indicate that the LiNbO3 thin films fabricated under 120 mm...

This paper shows the results of investigation of stability of resistivity of polycrystalline and nanocrystalline ZnO thin films obtained by pulsed laser deposition (PLD) under thermal cycling in the range from 30 °C to 300 °C. The results show that stability of resistivity during thermal cycling depends on PLD modes, post-growth annealing, and comp...

The results of experimental researches of the geometrical parameters of vertically aligned carbon nanotubes (VACNTs) are present by atomic force microscopy. The analysis of the applicability of the different AFM modes to determine the geometrical parameters of VACNTs array was carried out and based on this analysis the rapid-technique for determina...

We have developed a mathematical model of electrophysical and gas sensitive properties of nanosized ZnO film during chemisorption of gas molecules of CO, CO2, CH4, and NO2 on its surface and figured out regularities of influence of thickness of depletion layer of nanosized ZnO films on their electric and gas sensitivity properties. We have determin...

The effect of deposition conditions on the tribological behavior of titanium nitride thin films produced by reactive magnetron sputtering has been studied. Dependences of the hardness, the width of the friction track, the friction coefficient, and the volume wear of the TiN films on the N2 reactive gas flow rate have been obtained. Conditions of de...

In the experiments we defined modes, and developed the technology of formation of elements of input-output laser emission and microlens of integrated acousto-optic cell by Pulsed Laser Deposition and Focused Ion Beams by using nanotechnology cluster complex, allowing controlled creation of elements in a single process cycle.

The specific features of the formation of nanocrystalline ZnO films by pulsed laser deposition have been studied at different target–substrate distances. Expressions for estimating the temperature, particle con� centration, and pressure in the laser ablation plume have been obtained. The effect of these parameters on electrical properties of nanocr...

This paper presents results of the formation of high aspect nanostructures by local deposition of carbon, stimulated by focused ion beam (FIB). The structures used in the modification of the probe sensors were cantilevers for atomic force microscopy (AFM). The FIB structure of 5 mm length and 50 mm radius of curvature formed on the surface of the c...

The influence of the parameters of the deposition process on the stoichiometric composition and electrical and optical properties of ZnO films deposited by the ion-beam sputtering of a ZnO target is studied. It is established that, upon sputtering of a ZnO target with stoichiometric composition, there is a deficit of oxygen in the films deposited....

Nanocrystalline thin films of ZnO have been fabricated using the pulsed laser deposition method. The influence of the ion/atom ratio on the structural, morphological, and electrical parameters of these films is considered. It is established that, in the case of ion action on thin films, their crystalline structure and electrophysical properties are...

Nanocrystalline ZnO thin films were grown by pulsed laser deposition technique on polycor substrates. The operation laser fluence of 2.0 J·cm-2 and film thickness of 60 nm were fixed while varying target-to-substrate distance (20-135 mm), substrate temperature (100-500 °C) and annealing temperature (300-700 °C). Structural and morphological investi...

Nanocrystalline VOx thin films were manufactured by using pulsed laser deposition. The influence of deposition time on electrical parameters of VOx thin films were researched. It was determined that changes in deposition time lead to significant changes in properties of thin films, including resistivity in the range from 5 Ohm·cm to 70 Ohm·cm. The...

Nanocrystalline ZnO thin films were manufactured by Ion Beam Assisted Pulsed Laser Deposition (IBAD PLD). The influence of technological parameters and parameters of ion assisted deposition on structural, morphological and electrical parameters of ZnO thin films were researched in the experiments. As a result it was determined that changes in the b...

Предполагаемая полезная модель относится к области газового анализа, сенсорной технике, а более конкретно к детектирующим устройствам, для определения концентрации различных газов. Детектирование газов, попадающих на газочувствительный элемент достигается тем, что соединение распределенного верхнего электрода и газочувствительного слоя выполнено пл...