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Register a new userStudy of Islands Formation and Growing in thin films by AFM
دراسة تشكل الجزر و نموها في الأغشية على ركائز زجاجية بمجهر القوة الذرية
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سهام الطرابيشي( باحث )
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تُعرض في هذه الورقة دراسة بمجهر القوة الذرية لأغشية من ZnS وضعت حرارياً بثخانات مختلفة على ركائز زجاجية. سجلت صور طبوغرافية لهذه الأغشية، و جداول تتضمن أهم برامترات معالمها، بمجهر القوة الذرية. ثم كُشف عن تشكل الجزر و نموها في أغشية بثخانات ضوئية مختلفة أو في نقاط مختلفة من الغشاء نفسه الذي يفترض تبعاً لطريقة التحضير أنه متجانس الثخانة الضوئية. و لهذا الغرض أجري تحليل للجزر المتشكلة على سطوح الأغشية من خلال تطبيق برمجية لتجزئة السطح تسمح بالكشف عن المعالم المهمة فيه من قمم و قيعان. كما فرزت تلك الجزر و درس توزع برامتراتها في النقاط المدروسة.
In this paper we present a study of ZnS thin films thermally deposited on glass substrates, with different optical thicknesses. On topography micrographs and feature parameters obtained by Atomic Force Microscope, we pursued the islands formation and growing in ZnS thin films even on the same optical thickness of the film. For doing so, we analyzed the micrographs surface, using Watershed Segmentation and Wolf pruning that allow the detection of significant features on surfaces, Grain sorting operator and Parameter Distribution Study.
References used
Gao X. D., Li X. M, Yu W. D., Studies of zinc and lead chalcogenide thin films grown by SILAR Thin Solid films 468 (2004)43
Cheng J., Fan D., Wang H., Liu B. W., Chemical bath deposition of crystalline ZnS thin films, Semicond. Sci. Technol. 18 (2003)676
S. H. Deulkar, C. H. Bhosaile, M. Sharon, A study of structural, compositional and optical properties of spray-deposited non-stoichiometric (Zn,Fe)S thin films, J. Phys. Chem. Solids 65(2004)1879
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We present in this paper a graphical study of regions of thermally deposited
ZnS thin films on glass by atomic force microscope (AFM). This study consists
of volume parameters and functional parameters of these films surfaces for the
object of inv
estigating the possibility to retain fluids by these films. For doing
so, we registered Abbott-Firestone curves that are based on height distribution
for these films, we measured volume and functional parameters in the whole
pores. Using the thresholding operator we followed parameters distribution in
depth of the surface. At the end we compared these parameters by the results of
another study based on slice selection at different levels.
AFM has been used to get microscopic information of the surface structure
and to plot topographies representing the surface relief. AFM technique can be
used to visualize the surface relief, specify the growth of thin films, and
determine Height parameters.
الخشونة
التموج
جذر متوسط مربع الارتفاعات
العزم الإحصائي الثالث
الانحراف عن التناظر
العزم الإحصائي الرابع
وصف التفلطح
المتوسط الحسابي للارتفاعات
كثافة القمم
المتوسط الحسابي لانحناءات القمم
(Roughness (R
(Waviness (W
(Root Mean Square height (RMS
Surface Skewness
Surface Kurtosis
Arithmetical mean height
Density of peaks and Arithmetic mean peak curvature
المزيد..
In this paper we present the preparation of PbS nanocrystalline thin films
using Chemical Bath Deposition (CBD) technique. We have performed this
work in order to study the photoconductivity of PbS semi-conductor thin films.
The details of the pre
paration method are described. Thickness of deposited
films has been determined using mechanical and optical methods. From the
optical absorption measurements we have determined the band gap values.
Using the first approximation parabolic bands model and the obtained values
of band gaps, we have determined the size of PbS nanocrystallites. Also, we
have investigated the electrical and photoelectrical behaviors of the PbS films.
Our study shows that the size of PbS thin films nanocrystallites affects the
photoconductive properties of the material. Furthermore, investigations show
that there are two different sizes of grains located in two different layers, the
first one, with grain’s size of about 25nm, concerns the part of PbS deposited
directly on the glass substrate and the second layer, with grain’s size of about
70nm, concerns the PbS deposited on the first layer.
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the main cause of cancer. Therefore our present paper deals with the way of carbon fine dust formation during fuel burning in engines and gives a mathematical model describing that complex method, and studying the different function affecting its formation, the aim is to find a way to develop the burning process in engines and increase its working and decrease the pollution produced.
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method on glass and silicon substrates at low temperature (100°C). Room temperatu
re
photoluminescence (RT PL) spectra, secondary ion mass spectroscopy (SIMS), and Hall
Effect measurements were made for as-grown ZnO layers. The annealing process was
performed in air as well as in N2 atmosphere at 400°C for half an hour. The long annealing
resulted in a larger reduction in electron concentration. Simultaneously, an evident
increase in carrier's mobility was observed, which may suggest that annealing resulted in a
decreased number of native defects in the ZnO layers. Also, it was observed that hydrogen
atoms in ZnO samples did not dominate their electrical properties with the increase of
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