Tijjani Adam
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Preferred name
Tijjani Adam
Official Name
Tijjani, Adam
Alternative Name
Adam, T.
Adama, Tijjani
Adam, Tijjani
Adam, Tijjan
Tijjani, A.
Main Affiliation
Scopus Author ID
55074964600
Researcher ID
AAH-5534-2019

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Now showing 1 - 10 of 15
  • Publication
    Quantitative lead (Pb+) ion detection via modified silicon nanowire
    ( 2021-05-03)
    Uda Hashim
    ;
    Tijjani Adam
    ;
    Nuri A KH Ehfaed
    ;
    Muhammad Nur Afnan Uda
    ;
    Muhammad Nur Aiman Uda
    The study presented a functionalized silicon with (3-aminopropyl) triethoxysilane (APTES) to serve as a sensor for heavy metal detection. The amino-functionalized Si nanowires were tested against the heavy metal, lead (Pb). Due to the silicon electrochemical response towards the heavy metal ions, linear response to four different sources of water was observed. The results indicated that Pb can be detected with a high precision. Furthermore, confirmation was demonstrated using atomic absorption spectroscopy to determine the level lead content in the collected water source. Tab water (H2O), River H2O, Treated (H2O), DI (deionized) H2O and found the levels of 0.0859 mg/L, 0.0929 mg/L, 0.0052mg/L, 0.0023 mg/L with 5.8pA, 7.2pA, 4.6pA, 3.3pA current responses, respectively. Thus, with this high capability to discriminate water samples, the sensor potential can be employed for effective heavy metal detections and further be extended to a large sensor network in water treatment plant. A new microfluidic bonding material based on SU8 to implement electrical Nano chemical sensors for ions sensing, and an investigation of direct electrical measurement allowed for label free detection.. Thus, the study developed new room temperature bonding method using SU8 as an intermediate adhesive layer. The SU8 modified bonding was compared with non modified. The bond strength of SU8 modified was found to be stronger than ordinary plasma bonding under the same curing conditions. Overnight room temperature curing yields an average burst pressure of 420 kPa, which is more than adequate for many PDMS sensor devices. In contrast, non SU8 coated plasma bonded resulted in a burst pressure of only 174 KPa.
      2
  • Publication
    Determination of Silicon Electrical Properties Using First Principles Approach
    ( 2021-12-14)
    Uda Hashim
    ;
    Tijjani Adam
    ;
    Muhammad Nur Afnan Uda
    ;
    Muhammad Nur Aiman Uda
    Silicon nanowires have attracted attention as basis for reconfigurable electronics. However, as the size decreases, the electronic properties of the nanowires vary as a result of confinement, strain and crystal topology effects. Thus, at the thin diameter regime the band gap of Silicon nanowires can no longer be derived from a simple extrapolation of the isotropic bulk behaviour. This study compares band gap parameters in sub 10nm nanowires obtained from first-principles density-functional band structure calculations with extrapolations using continuum theory in order to rationalize the changes of the overall conductance, resistance and band gap. The device consists of silicon nanowire of size between 1 nm to 6nm. The results indicate an increase of, both the energy gap and the resistance along with reduced conductivity for the thinnest wires and a dependence on the crystal orientation with gaps reaching up to 4.3 eV along <111>, 4.0 eV along <110>, and 3.7 along <100>.
      5
  • Publication
    MPTES decorated IDE for arsenic (AS) selective detection
    ( 2021-05-03)
    Muhammad Nur Aiman Uda
    ;
    Tijjani Adam
    ;
    Mosbah A.B.
    ;
    Uda Hashim
    ;
    Muhammad Nur Afnan Uda
    Heavy metals ions are ions which generally occupied most part water sources such river, sea and other water flow channels such as drainage, water pipe. The exist of the ions in drinking water traces have called the attention researchers due to the recent discovery of the ions problem in both human health and aquatic animal such as fish. Fish come and encounter heavy metals ions in the river and ingest it and subsequently this fish eaten by man. The ions will pass to human and attack some human orgains. Finding the reliable solution to detect traces of heavy metals ions in water is a promising approach to eliminate such problems. This research aim is to enhance detection of heavy sensors, for sensor technology industry using the fabricated MTES surface-modified silicon interdigitated electrode to detect arsenic ion in water, The device was fabricated using conventional photolithography process coupled with deep RIE etching. The fabricated devices was modified surface and characterized by Scanning Electron Microscopy, Atomic Force Microscopy and high-power microscopy. The electrical analysis by applying voltage to measure the device response to the surface modification step and subsequently against arsenic ion as it bonded to the device via MPTES, various MTES concentrations distinguished against the bare device and arsenic concentration. Based on current and voltage analysis, concentration-dependent results were obtained, the detection limit for surface modified IDE to the arsenic detection was 20 pM with the linear response behaviour to the concentration, Thus, with this wonderful detection limits, the devices high high-performance characteristic by selectively distinguish arsenic ions against other foreign elements in the water.
      7
  • Publication
    High accuracy voltage amplifier electronic reader for two electrode electrical biosensor
    ( 2024-03-21)
    Muhammad Nur Afnan Uda
    ;
    Uda Hashim
    ;
    Muhammad Nur Aiman Uda
    ;
    Tijjani Adam
    Low current output detection based electronic reader are the key factor for biosensors commercialization. Two type electrode based amperometric biosensors show low current signal output around nanoampere (pA) to microampere (μA) range. In this research, an electronic reader system with voltage converter, voltage amplifier, main control circuit and LCD display was developed to detect current output value for two type electrode amperometric biosensors in selectable ranges of nanoampere. The current source module will act as a replacement for the biosensor input current. The experiment was to verified the electrical functionality measurements of the device by comparing the accuracy of the electronic reader with Keithley 2450 source meter. The Design Spark PCB software and LTspice software were used to design the electronic reader circuit. Arduino software was used to create a programming code to upload in NodeMCU microcontroller.
      1  19
  • Publication
    Size dependance of mechanical stiffness in silicon nanowire
    ( 2024-03-21)
    Uda Hashim
    ;
    Tijjani Adam
    ;
    Muhammad Nur Aiman Uda
    ;
    Muhammad Nur Afnan Uda
    The present present the effect of orientation of silicon nanowires on its band structure properties based on atomic interaction within SiNWs. It was observed the atomic interaction energy resulted in inducing force which created both repulsive or attractive generating free radicals which produce dynamic behaviour leading to band structure shrinkage. This effect has been observed in various theoretical studies for nanowires. At fixed position, the atom within the silicon significantly interact, resulting in relative molecular vibration.
      2  14
  • Publication
    Nanowires vibration properties
    ( 2024-03-21)
    Uda Hashim
    ;
    Tijjani Adam
    ;
    Muhammad Nur Aiman Uda
    ;
    Muhammad Nur Afnan Uda
    The vibration properties and the mechanical characteristic are important for the stability of electronics devices, particularly for Nano devices with high potential application. Silicon Nanowire show different properties from the corresponding bulk silicon. The understanding of its behaviour with reliable theoretical model explain the relation between size effect of the nanowire and the vibration frequency is significant to reveal the mechanical behaviour of the device is very important. Thus, this study, present the effect of small diameter of Silicon Nanowires on Its Vibration Properties is established based on the lattice parameters and the binding energy change of silicon nanowire based on first principles calculations through Abinit. Atomic interaction of the SiNWs obtained based on the density functional theory. It was observed that the atomic interaction energy as result of electromechanically induced pressure due -hole pair in which electron (e-) was reductive, and hole (h+) was oxidative. The hole (h+) reacted with e- in the second nanowire, generating free radicals (e-), superoxide anion and perhydroxyl radicals which create phonon group velocity this create vibration. Due to the excessive energy of process the temperature rises and alters the atomic cubic dimensions in turn affect its elastic properties. The nanowire compared with with bulk silicon exhibit high higher modulus, this as result of damped behaviour of the nanowire which is due to the high frequency vibration of silicon atoms at the edge of SiNWs and its Debye length is shorter. As the wire diameter decrease effect of the atomic vibration is reduced.
      1  15
  • Publication
    Electrical and topography analysis of 50 μm gap aluminium based interdigitated electrode
    ( 2024-03-21)
    Muhammad Nur Aiman Uda
    ;
    Uda Hashim
    ;
    Muhammad Nur Afnan Uda
    ;
    Tijjani Adam
    The aim of this research study is to study the electrical and topography analysis of fabricated Aluminium Interdigitated Electrode (Al IDE). Al IDE pattern was designed using AutoCAD software with 50 μM finger gap. Fabricated electrode was physically characterized using High Power Microscope (HPM), Scanning Electron Microscope (SEM) and electrically validated through I-V measurement using Current Source Meter (Keithley 2450) and sensor platform. Electrical measurement confirmed that Al IDE was well fabricated without any shortage and results of similar Al IDE samples were confirmed that the repeatability of the device.
      2
  • Publication
    Determination of silicon nanowire mechanical properties by first principle
    ( 2021-05-03)
    Uda Hashim
    ;
    Tijjani Adam
    ;
    Muhammad Nur Afnan Uda
    ;
    Muhammad Nur Aiman Uda
    Electronic and mechanical properties of SiNWs were studied based on First principle method via density functional theory. Effect of orientations on mechanical properties of silicon nanowire were identified. The elastic properties of {110}, {100}, {011} and {111} orientations were calculated. Due to atomic interaction in wires, various mechanical properties of wire changes were noted. The results show for strain 0.1164×10-5, 0.12×10-5 and 0.115×10-5 with modulus of 149.6GPa, 75.5GPa and 85.1GPa respectively.
      3  18
  • Publication
    Green route synthesis of antimicrobial nanoparticles using sewage alga bloom
    ( 2023-01-01)
    H.M A.
    ;
    Muhammad Nur Afnan Uda
    ;
    Subash Chandra Bose Gopinath
    ;
    Arsat Z.A.
    ;
    Abdullah F.
    ;
    Muttalib M.F.A.
    ;
    Hashim M.K.R.
    ;
    Uda Hashim
    ;
    Muhammad Nur Aiman Uda
    ;
    Yaakub A.R.W.
    ;
    Ibrahim N.H.
    ;
    Parmin N.A.
    ;
    Tijjani Adam
    Nanoparticles have a large surface area for their size and interact effectively with other particles. AgNPs may be created chemically, physically, or biologically. Biological techniques are considered the safest and cleanest since they use no toxic chemicals. Biological synthesis involves plant extracts, bacteria, fungus, algae, and other organisms. The algal production of AgNPs is of major interest. The abundance of algae and the ease with which it can be grown in a lab are two of the many reasons why it has become so popular as a nanoparticle production source. In this study, algae were employed as nanoparticles and antibacterial inhibitors against microbes.
      1  27
  • Publication
    Nano humidity and temperature sensors activated water pump agricultural system
    ( 2021-05-03)
    Tijjani Adam
    ;
    Uda Hashim
    ;
    Thing Y.C.
    ;
    Muhammad Nur Aiman Uda
    ;
    Muhammad Nur Afnan Uda
    Solar power is absolutely perfect for usage with irrigation systems and field landscape such as golf course, field and especially for planting. This study utilized 12 V Solar Panel, the energy from sun will converted to electrical energy, striking and shining causes the solar panel absorbs the energy of the sun. The designed water pumped was controlled by the humidity sensor, the system turn on the pump at particular preset time to keep the pump running automatically. The system was tested for two consecutive days with optimum generation of flow rate and switched with the humidity is high. Thus, this system is reliable and can be integrated with irrigation farms to support in automatic and constant water supply.
      4