An investigation on GaN/ porous-Si NO2 gas sensor fabricated by pulsed laser ablation in liquid
Abstract – Pulsed-laser ablation in liquid was used to prepare GaN nanostructure. The P-type GaN nanostructure was deposited onto the porous-silicon substrate through the drop-casting method for NO2 gas-sensor fabrication. Ablation was performed in ethanol using two laser wavelengths, namely, 532 and 1064 nm. The XRD pattern showed a high and sharp peak at 2θ= 29.49°, indicating enhanced GaN formation using a 532 nm laser wavelength. AFM and FESEM analyses confirmed increased GaN grain growth at the same wavelength. The optical reflectance of the GaN sample showed higher reflectance at 532 nm than at 1064 nm. The optical-energy bandgap was more elevated at 532 nm than at 1064 nm. Photoluminescence analysis revealed that the 532 nm sample had a higher-intensity peak than the 1064 nm one. Device-performance studies showed the most enhanced sensor response (158.49%), highest sensitivity (2.109 ppm), and best response time (13.5 s) at 250 °C for the sample prepared using 532 nm laser wavelength.
Corresponding Author: Prof. Ts. Dr. Uda Hashim
Corresponding Author’s Email: uda@unimap.edu.my
Download Abstract: PDF
Link to Publication: https://doi.org/10.1016/j.snb.2022.132163
INEE Won Two Gold at ITEX 2022
On 26 & 27 May 2022, the 33rd International Invention, Innovation & Technology Exhibition (ITEX 2022) was held at the Kuala Lumpur Convention Center, Malaysia.
Universiti Malaysia Perlis (UniMAP) has sent 30 products this time including two products from the Institute of Nano Electronic Engineering (INEE).
The two products are Multi-Detection of DNA HPV Biosensor via Functionalization of Deep Eutectic Solution (DES) for Early Detection of Cervical Cancer led by Ts. Dr. Nor Azizah Parmin and Mask Aligner for Photolithography Learning Module led by Prof. Ts. Dr. Uda Hashim.
Both products have received gold awards from ITEX 2022. In addition, UniMAP has received the ITEX Golden Award after collecting 21 Gold, 8 Silver and 1 Bronze.
Congratulations to all UniMAP researchers and in particular to INEE researchers.
Call for Papers 2022 Joint International Conference on Nanoscience & Nanoengineering (BOND 21 2022)
2022 Joint International Conference on Nanoscience & Nanoengineering (BOND 21 2022) will be held on 23-24 June 2022 in Kuala Perlis, Malaysia. BOND21 believes on the principle of building the nation’s wealth and prosperity through the advancement in science and technology. Therefore, the theme for 2022’s conference is chosen as “Nanoscience and Nanoengineering for Nation’s Growth and Sustainability”. BOND21 strives on the aspect of binding and bonding nanoscience and nanoengineering in creating high performance materials and devices with optimum cost through deep understanding on the theoretical framework and application principles. Bond21 also strives on maintaining and sustaining clean environment for future generation by promoting environment friendly and renewable aspects in the design and production of the materials and devices. Bond21 hopes to deliver enormous benefits to academicians, engineers, and the community at large.
BOND21 has been firstly hosted in 2013 which attracted more than 200 local and international participants. The 2nd Bond21 conference was also equally successful where it was organized in Bandung, Indonesia from 27th to 28th of July, 2018. A similar scenario is anticipated for this year’s BOND21 2022 with the conference will be organized in hybrid mode, offering both physical and virtual presentations. A similar scenario is anticipated for this year’s BOND21 2022 with the conference will be organized in hybrid mode, offering both physical and virtual presentations.
Paper Submission
We invite you to submit a research paper related to one of the topics of the conference through email bond21@unimap.edu.my. We really appreciate if you may kindly inform your colleagues and encourage them to submit their papers as well.
Topics
Topics include, but not limited to:
- Nanoscience – Theory, simulation, design, fabrication, synthesis, processing technology and characterization in the fields of physics, chemistry, biology, biotechnology, semiconductor material, device and process, sensors, superconductor, renewal energy, thin film, material science and electronics.
- Nanoengineering – Theory, simulation, design, device fabrication, synthesis, process technology, characterization and testing in the field of nanomaterial and nanoelectronics engineering.
Publication
All accepted papers will be published in AIP Conference Proceedings. Selected papers will be published in International Journal of Nanoelectronics and Materials (ISSN: Print: 1985-5761, Electronic: 2232-1535)
Important Dates (GMT +08:00)
- Full Paper Submission Deadline: 1 July 2022
- Notification of Acceptance: 15 July 2022
- Camera-Ready Paper Submission Deadline: 29 July 2022
- Registration & Payment Deadline: 19 Aug 2022
For more details, please visit our website: https://bond21.unimap.edu.my
For further information or queries please contact:
BOND21 CONFERENCE SECRETARIAT
Institute of Nano Electronic Engineering (INEE)
Universiti Malaysia Perlis (UniMAP)
Lot 110, 1st Floor, Block A, Taman Pertiwi Indah, Seriab,
Jalan Kangar-Alor Setar, 01000, Kangar, Perlis, Malaysia.
Phone: +6049798581
Fax: +6049798578
MiR-133a-3p overexpression-induced elevation of cisplatin-mediated chemosensitivity to non-small cell lung cancer by targeting replication factor C3
Abstract – Investigated the role of miR-133a-3p expression in NSCLC resistance to cisplatin (DDP) treatment and elucidate the possible mechanisms. MiR-133a-3p expression levels in DDP-resistant cells (SPC-1/DPP and A549/DDP) were measured using quantitative reverse-transcription polymerase chain reaction. Cell proliferation, cell apoptosis, cell cycle distribution, and DDP sensitivity were detected through flow cytometry, Cell Counting Kit-8 (CCK-8) and western blot analysis. In addition, databases were used to predict the miR-133a-3p targets, confirmed by dual-luciferase reporter assay. The miR-133a-3p expression levels obviously decreased in the A549/DDP and SPC-1/DPP cells [**P < 0.01; (n = 3)]. Upregulation of the miR-133a-3p expression notably suppressed cell growth, enhanced cell apoptosis, and resulted in cell cycle arrest in the SPC-1/DPP and A549/DDP cells. CCK-8 assay for the detection of proliferation of the miR-133a-3p mimic-transfected A549/DDP and SPC-A1/DDP cells treated with different DDP doses revealed IC50 values of NC mimic group: 6.85 μg/mL; miR-133a-3p mimic: 3.9 μg/mL and NC mimic group: 6.9 μg/mL; miR-133a-3p mimic: 3.99 μg/mL, respectively]. By contrast, it elevated DDP sensitivity in the A549/DDP cells and DDP resistance in the SPC-1/DPP cells. Mechanically, miR-133a-3p negatively regulated replication factor C3 and promoted DDP sensitivity in the SPC-1/DPP and A549/DDP cells, 94 potential targets that might bind to miR-133a-3p were identified.
Corresponding Author: Assoc. Prof. Dr. Subash C B Gopinath
Corresponding Author’s Email: subash@unimap.edu.my
Download Abstract: PDF
Link to Publication: https://doi.org/10.1016/j.procbio.2021.10.026
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