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present work, laser ablation as a method for texturization of
a polycrystalline silicon surface is studied. This involves creating a
roughened surface in order to decrease reflection from the surface of a
wafer. A special etching procedure was applied to remove the
laser-damaged layer. The textured surface was observed using a field
emission scanning electron microscope and an atomic force microscope.
The surface reflectance was also measured and the results show that
chemical etching needs to be applied after laser processing in order to
achieve reduced reflection from a low defect surface.
Texturization to Decrease Reflectance of Polycrystalline Silicon
Monireh Ganjali, Mansoureh Ganjali, Parvaneh
Sangpour, Ali Khanlarkhani, Mohammad Ali Meshkot,
Nanotechnology and Advanced Materials Department, Materials and Energy
Research Center (MERC);
(pp.62-67) Received: August 20th, 2011, Accepted: January 4th, 2012
Mansoureh Ganjali , Monireh Ganjali,
Soraia Khoby, Mohammad
of Au-Cu Nano-Alloy from Monometallic Colloids by Simultaneous Pulsed
Laser Targeting and Stirring
Experimental work has been focused on the formation of alloyed Au-Cu
nanoparticles under simultaneous laser exposure and mechanical stirring
of mixed monometallic colloids, here referred to as dual procedure. As
a feed for the dual procedure, Au and Cu monometallic nanoparticle
colloids have been using a laser ablation technique. To accomplish
this, bulk targets were ablated with 1064 nm wavelength Nd:YAG laser in
a pure acetone (99.99%) environment. Ultraviolet-visible optical
absorption spectrometry, transmission electron microscopy, X-ray
diffraction and X-ray fluorescence technique have been used to
characterize the nanoparticles. It has been found that experimental
conditions such as stirring and laser parameters strongly affect the
synthesized particle properties, including the size, shape, composition
and stability of the nanoparticles. Alloy nanoparticles containing 39%
Au – 61% Cu have also been prepared in the same process, but in two
forms of a homogeneous alloy and a core-shell structure.
A Database to track progress of over 2000 sites,
including location, subcontractors, site candidate, lease agreement,
rental, owners and payment tracking.
Project Proposal including hardware and software,
human resources for producing customer invoices based on scattered
information in different databases.
Automatically Formatting a daily report of the
latest project financial and progress status such that queries can be
applied to the resulting dataset.
System including Journal Entry Field Descriptions, File
Naming Convention and Directory Name Rules. How to store
documents and how to find them.
Visualisation. I tend to make contract
visualisations in order to make complex contracts more widely
understandable and to convey consequences, responsibilities and
Order Process produced to deal with project changes with
least impact and dispute avoidance. The Invoicing Process is an
overview of technical and financial data flow paths into a database to
generate seamless contractor and client side invoicing within agreed
parameters and formats.
of Science Thesis on the prediction of cement mortar strength
and density by using the flow time and solid volume of the natural sand
used to make the mortar.
Read a summary of this
work by clicking HERE
or download the whole
thesis by clicking HERE. 4.6 Mb
As with any
disciplined degree, during my PhD I gained more experience in the
Scientific Method, which I had been using until then and have been
using throughout my life. The urge for solving problems, the ability to
analyse facts and figures free of hype, emotions and prejudice; and the
determination and stamina to see the work through to its conclusion.
My Ph.D. project was about
amorphous or glassy metals. No you can’t see through them! Glassy here
refers to their lack of crystalline atomic structure. That is, during
production the atoms are not allowed to come together to form crystals.
Hot atoms at over 1600 degrees centigrade tend to move very fast, so to
stop them forming crystals you need to put other atoms in their way,
but more importantly you need to cool them at around 1,000,000 degrees
This project was about making the right alloys to cool down. It
involved designing and making experimental apparatus and a lot of
experiments at over 1600 degrees centigrade. During this work I learned
more about analytical methods such as x-ray diffraction techniques,
interpretation of diffraction patterns on film, densitometry and
electron microscopy. I learned more about working with refractory
materials, with molten metals, at vacuum, at high and low gas pressures
and about mixing gasses.
As a side effect of my experiments, I produced pure white silicon
carbide fibres from condensed vapour.
You can read the Abstract here
PhD thesis from here 5Mb
When migrating relational medical formulary data from
old systems to new ones, it is critical to ensure that data is ported
correctly, verifiably and traceably. When more than 50 people
are to check/modify/update the data during the migration process, it
becomes even more important to be able to track any change made by any
one person. When any one person is only allowed to see part
of the data, and the data is over 200 Mb, then it becomes a challenging
problem to solve. Click here to see how I solved this
|| CSV Text File
Analysis Tool. An application for MS
Excel to import and compare text files with Comma Separated Values and
take various actions according to the comparison results.
|| Great Islamic
Encyclopaedia Entries Database.
A database to keep track of article entries to be produced for the
Great Islamic Encyclopaedia. The database can keep track of
articles as they progress through the stages of research, author
selection, review and summary of research materials, article draft,
pier review, edit, cross-reference, typesetting and publication. All
the data relating to each article is held within the database.
|| The Application
of Computing to Historical
Documents. This work relates to Bills
of Exchange from 1883 AD to 1932 AD when Barats were used in commerce.
The essential items of information were extracted from 6800 Barats and
analysed to find trading trends of that period.
|| Sample Visual Basic for
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|| Sample Visual Basic for
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|| Sample Piping Engineering Report
||A Database of Piping Engineering
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|| A Furnace Designed and Built to
Work constantly at 1600°C and for short periods at 1800°C
|More Samples to be Added