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Me during my PhD graduation at University of Southampton, UK in 2017

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Me during my PhD graduation at University of Southampton, UK in 2017

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Introduction to comsol and FYP project

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My name is Umi Hanifah binti Ghazali.

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Satu perkara yang saya paling ingat semasa online meeting tersebut adalah tentang cara kita menjawab soalan. Sebagai pelajar, kita mestilah tahu dan faham soalan yang diajukan sebelum menjawab.

Banyakkan membaca artikel/journal untuk mendapatkan info sedikit sebanyak berkaitan dengan tajuk FYP.

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My understanding from today's meeting:
> Phase-matching of surface plasmon excite the Surface Plasmon Resonance (SPR) - apabila frekuensi cahaya = frekuensi plasmonic, ia boleh 'excite' satu electromagnetic wave yang dipanggil sebagai SPR
> SPR - commonly using gold thin film ~50-100nm
> LSPR - gold nanoparticle ~5-15nm

Next, what we have to do is working on Optic Fiber (OF) in Comsol.
> Use 'Finite Element Method' to find the Single Mode Fiber (SMF) and Multi Mode Fiber (MMF)
> Find the absorption peak of LSPR using different size of gold np deposited on OF
> From here, we can find the suitable LSPR peak for X-ray/Gamma-ray (depending on what available in lab)
> Then we can proceed to 'build' a gold np deposited on OF-colorimetric-dosimeter irradiated with a range of X-ray/Gamma-ray depending on the size of gold np

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Me when I finally got a chance to visit BookXcess in JB for the first time.

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Me when I finally got a chance to visit BookXcess in JB for the first time.

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Introduction to FYP world and a mini project

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During the meeting, I have been exposed to what I would be focusing on, the project, and how we could tackle it down. A rough picture at that moment was enough to shape what needs to be done later.

There will be more reading which needs to be done because I am not so fond of the topics and it is pretty cool that we are about to take on from the aspects of Health Physics and Optics. A different path! I can't wait to express what I understand about my work.

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let me know your feedback and what u have learned so far in your posts :)

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Comparing LSPR and SPR for Diagnostics - LamdaGen

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From the meeting,
after presenting our understanding of the work we were about to do. We discussed how much more we needed to understand the application of optical fiber in Comsol.

Highlights from the meeting.
1) Simulation
- Do single-mode fiber & multi-mode fiber by using the Finite Element Method. (separate)
- Carry out simulation for max absorption of LSPR by using diff. sizes of Ag np which is deposited on optical fiber.

2) Exposure of Ag np over radiation.
- whichever is available in UTM lab.
(UV, gamma, etc)

-synthesize Ag np.
- do absorption (max) process.
- radiate it and see the effect.

3) Dosimeter.

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Graphical Understanding input and output.

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Graphical Understanding input and output.

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please upload the pictures of mode/s in SMF and MMF together with their effective refractive index today :) (26 oct 2021)

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please upload the pictures of mode/s in SMF and MMF together with their effective refractive index today :) (26 oct 2021)

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Still working on how to get the floral shape of MMF

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I'm still working on it. Apparently I got stuck because I didn't switch the coordinate system to Cylindrical from Cartesian. After remembering, something Dr told me the other day. This came up.

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We only managed to finish MMF and SMF, when we were supposed to do Silicon 3D simulation hahaha, (got confused a little with the work). Anyways, our next focus would be the modulation of nanoparticle in Comsol. We also discussed the due date , format and what needs to be included in our proposal. Oh, there's a new member who just joined us. Dr Nabihah. Welcome!

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Meeting week 4, welcoming Dr Nabihah to the group!

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Sepatutnya kami dah mula dengan tutorial Si gnp, tapi kami hanya buat 'tapered smf' kerana kekeliruan yang berlaku sesama pertemuan minggu ke-3 bersama Waseem.

Minggu ke-4, kami mula fokus pada Si np dan penulisan 'proposal'. Mengenai propsal, saya masih mempunyai beberapa persoalan untuk diajukan kepada Dr Fariza.

Seterusnya, kami perlu mencari parameter yang sesuai untuk lapisan gnp. Caranya adalah, kami perlu mencari tutorial di Youtube berkaitan gnp.

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Dapatan saya daripada tutorial Si np: https://youtu.be/8u4pNpf0N2o

Sedikit berbeza daripada tutorial, dan masih banyak yang perlu diperbaiki. Masih perlu 'dibedah' untuk mendapatkan graf 'Extinction Cross Section vs Wavelength'.

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After working with the equation error, I found out that I need to switch "eww" to "ewfd" following my initial choice. Next, when I tried to compute my simulation.  This error popped up and I am currently stuck here. 

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After working with the equation error, I found out that I need to switch "eww" to "ewfd" following my initial choice. Next, when I tried to compute my simulation.  This error popped up and I am currently stuck here. 

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The link I referred.

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Manage to get the Scattering Cross Section vs Wavelength graph.

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https://www.youtube.com/watch?v=jqqEQBLlMME

Tutorial kedua yang menjadi rujukan untuk mendapatkan graf di atas. Lebih mudah berbanding graf pertama.

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Comsol Multiphysics 5.2 tutorial for beginners Scattering Cross Section and far field calculation

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- Presenting about the simulation of Scattering Cross Section of Si NP.
- Reference: 1) https://youtu.be/8u4pNpf0N2o
2) https://www.youtube.com/watch?v=jqqEQBLlMME
- Discussing related FYP proposal - finalizing the objectives and problem statement

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Focused on the simulation we tried. Compared mine and Umi's results. (Si simulation)

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Completed chapter 1 & 2 of FYP Proposal. Next, focusing on Au NPs simulation.

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3-Minute Poster - Submitted on 25th Dec 2021

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3-Minute Poster - Submitted on 25th Dec 2021

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Submission - elearning.

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Had a session with Afif today. Learnt a lot on how to approach COMSOL (Situation :Nanorod). His method was unique and completely different from the paper, me and Umi referred on. It was also nice to see Dr Fariza and the cute little baby as well. hahaha.

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11 Jan 2021. Our meeting with comsol sifu -afif. Soon he will fly to UK for his PhD at Cambridge University

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11 Jan 2021. Our meeting with comsol sifu -afif. Soon he will fly to UK for his PhD at Cambridge University

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Great session with Afif regarding the NPs simulations. Still got a lot to learn about Comsol since we are an amateur, will he's a real pro. hehe

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Graph of Cross-section over area^2 versus wavelength of AuNPs with radius 60nm.

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Graph of Cross-section over area^2 versus wavelength of AuNPs with radius 20nm.

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Graph of Cross-section over area^2 versus wavelength of AuNPs with radius from 20nm - 60nm.

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Things to do:
1) Me & Kish:

Encik Amin

Xray - cumulative exposure - berapa minit exposure - boleh expose berapa kali

Log card

Hirarc Form - lab nuclear

Log card - T05

Chemial initial concentration

2) Dr Fariza:

Get in touch with Prof Suhairul - HSA - Xray

3) Kak Liyana

Lab equipment

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we welcome kak lyana into our team

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Me and Umi will be doing certain things this coming week which are getting our documents straight (HIRAC, Logcard (2 labs), and whether OSHE document is needed), the devices we are able to use and 'how we are going to use it", establishing starting point for our chemical record initial reading (gold/silver NP), the use of trineck (whether it's available or not), and hot plates. We got an early start. Let's go team!