Amir Razmjou

Amir Razmjou
UNSW Sydney | UNSW · School of Chemical Engineering

PhD in Chemical Engineering

About

162
Publications
40,269
Reads
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5,568
Citations
Introduction
Dr Razmjou's current research focuses on designing ion-selective nanostructured membranes for Lithium ion separations and resource recovery, developing advanced Biomicrofluidics systems using microfabrication technologies (MEMS, NEMS and nanobiosenoures), and biocatalytic conversion of CO2.
Additional affiliations
March 2012 - April 2013
Monash University (Australia)
Position
  • PostDoc Position

Publications

Publications (162)
Article
The continuous increase of demand for lithium (Li) chemicals in industrial applications calls for exploring affordable Li production and sustainable options beyond land mining. Thus, aqueous resources, such as geothermal brine, salt lake brine, and seawater, play an essential role in continuous Li supply due to abundant storage and low cost. Adsorp...
Article
Lithium is a critical energy element that plays a pivotal role in transitions to sustainable energy. Numerous two-dimensional (2D) membranes have been developed to extract Li⁺ from different resources. However, their Li⁺ extraction efficacy is not high enough to meet industrial requirements. Here, we introduce an approach that boosts Li⁺ selectivit...
Article
Full-text available
Artificial intelligence (AI)‐assisted materials design and discovery methods can come to the aid of global concerns for introducing new efficient materials in different applications. Also, a sustainable clean future requires a transition to a low‐carbon economy that is material‐intensive. AI‐assisted methods advent as inexpensive and accelerated me...
Article
Although polymeric membrane has superior properties, its applications in biomedical and food industrial fields are minimal. Biofouling is a significant concern in the membrane, created from particular interactions between the membrane and untreated water content. This research showed that a careful superhydrophilic modification of polyethersulfone...
Article
The increasing amounts of emerging contaminants (ECs) in aquatic ecosystems are becoming one of the serious environmental issues. Therefore, the efficient removal of ECs is of urgent importance. Herein, a computational technique of molecular dynamics (MD) and the density functional theory (DFT) were employed to assess the adsorption affinity of thr...
Article
The ever-growing global demands for lithium (Li⁺) require energy-efficient techniques to separate lithium from natural resources and commercial wastewaters. We propose a facile seed-assisted in-situ growth method to prepare double-layered UiO-66-based (–(COOH)2 and –NH2) membranes for Mg²⁺ and Li⁺ separation in brine. These membranes, with sub-nano...
Article
Balance disorders affect approximately 30% of the population throughout their lives and result in debilitating symptoms, such as spontaneous vertigo, nystagmus, and oscillopsia. The main cause of balance disorders is peripheral vestibular dysfunction, which may occur as a result of hair cell loss, neural dysfunction, or mechanical (and morphologica...
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Full-text available
The mass production of lithium-ion batteries and lithium-rich e-products that are required for electric vehicles, energy storage devices, and cloud-connected electronics is driving an unprecedented demand for lithium resources. Current lithium production technologies, in which extraction and purification are typically achieved by hydrometallurgical...
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Biological ion channels feature angstrom-scale asymmetrical cavity structures, which are the key to achieving highly efficient separation and sensing of alkali metal ions from aqueous resources. The clean energy future and lithium-based energy storage systems heavily rely on highly efficient ionic separations. However, artificial recreation of such...
Article
Over the past decade, tremendous growth has been witnessed in the synthesis of scaffolds fabricated by natural or synthetic, composite, or hybrid biomaterials to enhance wound healing, repair of bone fractures, and pathological loss of bones. However, the current limitations of using these scaffolds in tissue engineering are impaired cellular proli...
Article
A potential adsorbent for Li⁺ extraction from liquid resources is titanium-type lithium-ion sieves (LISs) because of their structural stability and high adsorption capacity. However, the adsorption efficiency and recycling stability of LISs produced with various TiO2 precursors vary significantly. Additionally, traditional TiO2 is often produced us...
Article
Huge masses of waste containing hazardous but often valuable metals are being produced worldwide. Recycling these wastes is necessary because mineral deposits are being depleted rapidly, making mining more expensive, and recycling hazardous metal compounds reduce environmental contamination. Compared to conventional methods of metal recycling, such...
Article
The demand for lithium has increased incredibly during the last decade as it has become the mainstream for the growth of industrial products; especially batteries for electric vehicles and electronic devices. Given the high demand for lithium, researchers are focusing on methods for extracting lithium from a variety of sources. Among different liqu...
Article
Full-text available
In this paper, an effective control system based on Deep Learning (DL) algorithm is designed to administer and actuate an in-house 3D printed robotic hand using myoelectric sensors. Five servo motors are utilised to actuate the robotic hand’s components with 17 degrees of freedom (DoF). This research investigated using a minimum number of myoelectr...
Article
Graphene oxide (GO)-based pervaporation membranes have great potential for desalination and lithium containing brine enrichment. However, they experienced critical challenges when used in aqueous solution and exposed to oscillating temperatures due to swelling and microdefects. In this work, the GO-based membranes were fabricated by the filtration...
Article
In this work hyper-branched poly (amide amine) (PAMAM) nanoparticles were conjugated with hyaluronidase (Hyal) to produce a robust nano-biocatalyst for hyaluronic acid (HA) degradation. The success enzyme attachment process was confirmed by Fourier transform infrared (FTIR), transmission electron microscopy (TEM), dynamic light scattering (DLS), an...
Article
This study is aimed at employing the Molecular Dynamics simulations to assess the phenazopyridine (PHP) adsorption, an analgesic drug, on three new metal-organic frameworks (MOFs); IRMOF-16, HKUST-1, and ZIF-8, with excellent behavior in π−π stacking, H-bonding, and electrostatic interactions. To further decipher the adsorption mechanism of PHP on...
Article
The global shift of energy resources from fossil fuel to renewable energy sources has already begun. The critical energy element of lithium (Li) plays an important role in this energy transition, which is demonstrated by the fast increase in its demand. Rapid and continuous detection of Li has become an important field, as the overexploitation of L...
Article
Flow sensors play a critical role in monitoring flow parameters, including rate, velocity, direction, and rotation frequency. In this paper, inspired by biological hair cells in the human vestibular system, an innovative flow sensor is developed based on polyvinyl alcohol (PVA) hydrogel nanocomposites with a maze‐like network of vertically grown gr...
Article
Nano structured ion-selective membranes (ISMs) are very attractive materials for a wide range of sensing and ion separation applications. The present review focuses on the design principles of various ISMs: nanostructured and ionophore/ion acceptor doped ISMs and their use in biomedical engineering. Applications of ISMs in the biomedical field have...
Article
2-D materials with nanofluidic channels have gained significant attention for their potential as an ion separation membrane. However, the fundamental understanding of the interactions between nanochannel sizes and ion selectivity and conductivity remains complex as experimentally controlling the free interlayer spacing in sub-nanometer scales is ch...
Article
With the development of light and rechargeable batteries for electric vehicles, global demand for lithium has increased considerably in recent years. This has drawn more attention to how lithium is produced, especially on primary extraction operations such as those at the Salar de Atacama in Northern Chile. There are concerns that brine extraction...
Article
In this study, a novel micromixer with a 3D helical, threaded channel was fabricated via 3D printing. The micromixer can enhance the mass transfer of reactants and product in an enzymatic cascade reaction converting CO2 to formic acid. Two enzymes, including carbonic anhydrase (CA) and formate dehydrogenase (FDH), were biomineralised in a zeolitic...
Article
Nanochannels offer significant practical advantages in many fields due to their interesting characteristics, such as flexibility in shape and size, robustness, low‐cost and their ability to be modified based on the required applications. The effectiveness of ion separation in nanochannels can be assessed based on the selective transport of the desi...
Article
Phosphorus depletion around the globe has made it a critical element for sustainable agriculture resulting in significant research into options to recover and recycle this non-renewable resource. Phosphorus recovery as struvite usually requires the dosing of supplemental commercial magnesium and can account for between 10 and 75% of the cost of str...
Article
Metal organic frameworks (MOFs) represent one of the largest classes of porous crystalline materials. MOFs have been increasingly applied as functionalizing agents for membranes because of their porosity, high surface area, small particle size, aspect ratio control, tuneability, compatibility with a polymeric network, and exuberance of diverse func...
Article
Balancing ionic selectivity against permeability in filters made from graphene remains a challenge today. Interlayer distance, as the most important factor, dominates nearly all aspects of the flow inside the channel, from the formation of water molecules to the hydration shell of the ions. Unraveling the effects of the interlayer distance on the p...
Article
Full-text available
Despite the huge contribution of membrane-based brine and wastewater purification systems in today’s life, biofouling still affects sustainability of membrane engineering. Aimed at reducing membrane modules wastage, the need to study biofouling monitoring as one of contributory factors stemmed from the short time between initial attachment and irre...
Article
Although the incorporation of nanoparticles into ultrafiltration polymeric membranes has shown promising outcomes, their commercial implementation has yet to be fulfilled due to inconsistency in data, lack of a reliable recipe for the optimum filler content, and reluctance in disrupting the production line which requires significant time and resour...
Article
The hazardous effects of pollutants emitted by conventional fuel vehicles have moved academic and industrial authorities toward the utilization of a more efficient alternative energy source. Due to its unique characteristics, considerable attention has been recently devoted to hydrogen as an ideal synthetic energy carrier. Despite promising advanta...
Article
The rapidly growing demand for lithium has resulted in a sharp increase in its price. This is due to the ubiquitous use of lithium-ion batteries (LIBs) in large-scale energy and transportation sectors as well as portable devices. Recycling of the LIBs for being the supply of critical metals hence becomes environmentally and economically viable. The...
Article
In this study, a novel machine learning approach is proposed for estimation of the permeate flux and foulant rejection in nanocomposite filtration membranes. Nine independent variables are fed to artificial neural networks (ANNs) including support, nanoparticles concentration, concentration of organic phase trimesoyl chloride (TMC) in-n-hexane (TMC...
Article
Biphasic calcium phosphate ceramics (BCPs) have been extensively used as a bone graft in dental clinics to reconstruct lost bone in the jaw and peri-implant hard tissue due to their good bone conduction and similar chemical structure to the teeth and bone. However, BCPs are not inherently osteoinductive and need additional modification and treatmen...
Article
Protons transport profoundly affects diverse fields from proton-exchange membrane fuel cells to storing liquid hydrogen. Recent advances have extended proton-exclusive transport to the two-dimensional channels that use hydrous mechanisms for fast proton transport, where the main challenge is the limited selectivity. However, the physical and chemic...
Article
External and internal concentration polarizations are critical bottlenecks in the application of forward osmosis. This study examines the overall mass transfer performance of a submerged membrane vibration system for flat sheet and hollow fiber configurations. The application of membrane vibration at 14.3 Hz resulted in a flux enhancement of at lea...
Article
Enzymatic reduction of CO2 through cascade reactions into useful chemicals or fuels is a promising option to reduce CO2 emission. However, the temperature of exhaust flue gas from power plants can reach temperatures as high as 150 °C which would denature the enzymes. Recently, the biomineralization of thermally robust metal-organic framework (MOF)...
Article
The continually increasing demand for lithium (Li) is predicted to soon exceed its availability, rendering it a geopolitically significant resource. Although seawater is considered one of the largest Li resources, the coexistence of Li ion (Li+) with chemically similar ions such as Na+ and K+ in seawater and its low concentration makes the Li+ extr...
Article
Full-text available
Purpose: Despite the significant advances in modeling of biomechanical aspects of cell microenvironment, it remains a major challenge to precisely mimic the physiological condition of the particular cell niche. Here, the metal-organic frameworks (MOFs) have been introduced as a feasible platform for multifactorial control of cell-substrate interac...
Article
The extraction process of highly demanded lithium from brine normally starts with a solar evaporation pond to increase the lithium concentration, which takes more than a year and is weather-dependent. This work evaluated the enrichment of lithium from salt lake brine using graphene oxide (GO) composite pervaporation membrane with the crystallizer u...
Article
Lithium carbonate and lithium hydroxide are two compounds used for producing battery cathodes, however, lithium hydroxide is favoured in producing battery compounds as it possesses very high electrochemical potential and low density. As a result, there is substantial demand for development of anion-selective membranes capable of selecting hydroxide...
Article
To tackle the increased demand of lithium production, the separation of monovalent and divalent cations is crucial for lithium recovery from brine. Recently, metal-organic framework (MOF) has shown great potential in such application due to its tuneable pore size and pore channel chemistry in the sub-atomic scale. Commercialization of ion-selective...
Article
Lithium consumption is estimated to face a considerable rise in the next decade; thus, finding new reproducible lithium resources such as brine deposits and seawater has become a fast‐growing research topic. However, Li⁺ extraction from these resources is challenging due to its low concentration and presence of other monovalent cations exhibiting i...
Article
Full-text available
Recent advancements in sensing technology have led to developments of lighter and smaller control systems for prosthetic and biomedical applications. In this paper, we develop a bio-inspired sensory system for a master-slave force-sensing robotic hand which allows accurate control and provides a natural sense of touch to humanoid robotic hand, base...
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Full-text available
Available online xxx Keywords N-hydroxysuccinimide Platinum nanoparticle Polyoxometalate Hexagonal boron nitride nanosheets 1-hexyl-3-methylimidazolium chloride Voltammetric sensor ABSTRACT In this study, a novel electrochemical method as a conductive voltammetric sensor for determination of N-hy-droxysuccinimide was developed. The N-hydroxysuccini...
Article
The demand for food and beverage markets has increased as a result of population increase and in view of health awareness. The quality of products from food processing industry has to be improved economically by incorporating greener methodologies that enhances the safety and shelf life via the enzymes application while maintaining the essential nu...
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Full-text available
A highly sensitive electrocatalytic sensor was designed and fabricated by the incorporation of NiO dope Pt nanostructure hybrid (NiO–Pt–H) as conductive mediator, bis (1,10 phenanthroline) (1,10-phenanthroline-5,6-dione) nickel(II) hexafluorophosphate (B,1,10,P,1,10, PDNiPF6), and electrocatalyst into carbon paste electrode (CPE) matrix for the det...
Article
Aquatic chemical sensors have experienced rapid development in recent years largely due to advances in the fields of nanotechnology. Accurate in situ monitoring of nutrients is fundamental to understanding the biogeochemistry of aquatic ecosystems and is necessary for the sustainable utilization of water resources. Although many sensor technologies...
Article
Recently, membrane-immobilized enzyme as an affordable bioreactor has been explored in various fields such as biodiesel production and biosensing because of the reusability of the biocatalyst, increasing its stability and being a low-cost separating unit for producing pure products. Usually, membrane modification could affect the surface morphology...
Article
Vacuum membrane distillation can extract pure water from degraded sources, but it requires relatively high energy inputs as compared to other thermal-driven technologies. As a commercially successful example, Memsys Water Technologies GmbH has addressed this key limitation by developing a flat sheet-based vacuum membrane distillation module where t...
Article
Nanofiltration was investigated for the recovery of platform chemicals, specifically succinic acid, from high-strength bioethanol waste (dunder). Conventional methods focusing on chemical precipitation entail poor selectivity in complex matrices and are inherently expensive owing to the consumption of large volumes of chemicals and the generation o...
Article
The programmed cell death ligand 1 (PD-L1) protein has emerged as a predictive cancer biomarker for sensitivity to immune checkpoint blockade-based cancer immunotherapies. Current technologies for the detection of protein-based biomarkers, including the enzyme-linked immunosorbent assay (ELISA), have limitations such as low sensitivity and limit of...
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Full-text available
Metal–organic frameworks (MOFs) have high porosity, large surface area, and tunable functionality and have been widely used for drug loading. The aim of this study was to exploit unique features of zeolitic imidazolate framework-8 (ZIF8) to develop an innovative composite microcarrier (MC) for human mesenchymal stem cells (hMSCs) adhesion and proli...
Article
Full-text available
This paper suggests development of a flexible, lightweight, and ultra-sensitive piezoresistive flow sensor based on vertical graphene nanosheets (VGNs) with a mazelike structure. The sensor was thoroughly characterized for steady-state and oscillatory water flow monitoring applications. The results demonstrated a high sensitivity (103.91 mV (mm/s)−...
Article
Membrane distillation represents a promising solution for high salinity water desalination (e.g. shale gas produced waste wastewater), but so far it has achieved limited commercial success relative to other thermally driven desalination technologies. This study aims to advance membrane distillation technology by systematically investigating three i...
Article
Developing a facile approach for the manipulation of the direction and order of the enzymatic reactions via sequential immobilization on inexpensive substrates is a continuous demand. Herein, a new methodology is introduced that allows making a desired enzymatic reaction pathway on a paper‐based microfluidic‐membrane based biosensor (P‐µMB). Althou...
Article
Full-text available
In this study, a novel electrochemical method as a conductive voltammetric sensor for determination of N-hydroxysuccinimide was developed. The N-hydroxysuccinimide sensor was achieved by carbon paste electrode (CPE) amplified with tri-component nanohybrid composite (Platinum nanoparticle/Polyoxometalate/Two-dimensional hexagonal boron nitride nanos...
Article
Full-text available
Drug overdose (DO) is considered one of the current issues of intravenous (IV) infusion particularly resulting in serious injuries and deaths. Malfunction of infusion pumps is reported as the main cause of the drug overdose. Live monitoring and flow rate calculation by health professionals have been practicing to avoid DO. However, human errors and...
Article
The development of stable and effective iodine removal systems would be highly desirable in addressing environmental issues relevant to water contamination. In the present research, a novel iodine adsorbent was synthesized by self-polymerization of dopamine (PDA) onto inert polypropylene (PP) membrane. This PP/PDA membrane was thoroughly characteri...
Article
Inertial microfluidics has emerged over the past decade as a powerful tool to accurately control cells and microparticles for diverse biological and medical applications. Many approaches have been proposed to date in order to increase the efficiency and accuracy of inertial microfluidic systems. However, the effects of channel cross-section and sol...
Article
Instant detection of antibiotic residues in dairy products has been remained a challenge. Current methods require careful samples storage and handling, skilled personnel, and expensive instrumentations. Herein, we report the preparation of a ratiometric fluorescent sensor that contains different colored Carbon dots (CDs) as dual fluorophores, and a...
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Full-text available
It is predicted that the continuously increasing demand for the energy-critical element of lithium will soon exceed its availability, rendering it a geopolitically significant resource. The present work critically reviews recent reports on Li+ selective membranes. Particular emphasis has been placed on the basic principles of the materials’ design...
Article
Staphylococcus aureus and Staphylococcus epidermidis are considered as major human pathogens and their resistance to antibiotic treatment and host defense systems can be increased due to the formation of biofilms. The biofilm-associated biofouling of industrial surfaces, particularly membranes, remains a serious concern that challenges investigator...
Article
Granulomatosis with polyangiitis (GPA) is one of three described anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAV). Early diagnosis and treatment of GPA is paramount, as it may help prevent irreversible end-organ damage, especially renal and pulmonary failure. A 72-year-old male with a past medical history of lung adenocarci...