Muhammad Nur Aiman Uda
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Preferred name
Muhammad Nur Aiman Uda
Official Name
Muhammad Nur Aiman, Uda
Alternative Name
Uda, M. N.A.
Aiman Uda, Muhammad Nur
Uda, M. N.A.
Main Affiliation
Scopus Author ID
55984680000
Researcher ID
V-7751-2019

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Titanium dioxide (TiO2) doped reduced graphene oxide (rGO) with different dye for solar cell application

2020-01-01 , Uda, Muhammad Nur Afnan , Asral Bahari Jambek , Uda Hashim , Muhammad Nur Aiman Uda

In the present work, the surface morphology and electrical characteristic of different doping ratio of reduced Graphene Oxide (rGO) in Titanium Oxide solution with different organic dyes (turmeric and beetroot) were studied. The Titanium Dioxide (TiO2) solution and reduced Graphene Oxides (rGO) were synthesized by using precipitation-peptization method and chemical reagent, respectively. The TiO2-rGO thin film was deposited on the glass substrate by using doctorblade technique. The surface morphology and electrical characteristic were measured by using Scanning Electron Microscope (SEM) and Keitheley 2450 Source Meter, respectively. Experimental results showed that 0.3 wt% rGO with turmeric dye resulted the highest value of open voltage (Voc) and short circuit current (Isc) of Dye-sensitized Solar Cells (DSSC).

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Conductometric immunosensor for specific Escherichia coli O157:H7 detection on chemically funcationalizaed interdigitated aptasensor

2024 , Muhammad Nur Afnan Uda , Alaa Kamal Yousif Dafhalla , Thikra S. Dhahi , Tijjani Adam , Subash Chandra Bose Gopinath , Asral Bahari ambek , Muhammad Nur Aiman Uda , Nor Azizah Parmin , Nur Hulwani Ibrahim , Uda Hashim

Escherichia coli O157:H7 is a strain of Escherichia coli known for causing foodborne illness through the consumption of contaminated or raw food. To detect this pathogen, a conductometric immunosensor was developed using a conductometric sensing approach. The sensor was con-structed on an interdigitated electrode and modified with a monoclonal anti-Escherichia coli O157: H7 aptamer. A total of 200 electrode pairs were fabricated and modified to bind to the target molecule replica. The binding replica, acting as the bio-recognizer, was linked to the electrode surface using 3-Aminopropyl triethoxysilane. The sensor exhibited excellent performance, detecting Escherichia coli O157:H7 in a short time frame and demonstrating a wide detection range of 1 fM to 1 nM. Concentrations of Escherichia coli O157:H7 were detected within this range, with a minimum detection limit of 1 fM. This innovative sensor offers simplicity, speed, high sensitivity, selectivity, and the potential for rapid sample processing. The potential of this pro-posed biosensor is particularly beneficial in applications such as drug screening, environmental monitoring, and disease diagnosis, where real-time information on biomolecular interactions is crucial for timely decision-making and where cross-reactivity or interference may compromise the accuracy of the analysis.

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