Self-Assembly of Sodium Carboxymethyl Cellulose on Glass
Surface from Evaporating Drops

Omar, Rohit (2013) Self-Assembly of Sodium Carboxymethyl Cellulose on Glass
Surface from Evaporating Drops.
MTech thesis.



The advancement of modern science and technology needs day by day smaller microprocessors, chips, sensors, machines and devices, as a result the existing method of fabrication are slowly becoming obsolete. The fabrication of devices at small scale by the help of self-assembly is an inexpensive and promising technique. Evaporation of sessile droplets containing Sodium Carboxymethyl Cellulose induces outward flow within the drop, which is commonly well known as “coffee ring” effect or a dense ring like deposition along the perimeter. In this work, the formation of self-assembled structure during drying of microliter drops containing Sodium Carboxymethyl Cellulose with different organic (oxalic, acetic, citric) as well as inorganic (hydrochloric, nitric, sulphuric, phosphoric) acids is investigated with the help of optical microscope. The structure formation is also influenced by evaporative flux and Marangoni flow inside the liquid drop. The different parameters such as sodium carboxymethylcellulose concentration, acid concentration, drying time, drying temperature, humidity, stirring velocity, stirring temperature, pH and drop volume strongly influences the structure formation.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Self-assembly; Sodium Carboxymethyl Cellulose; Coffee-ring effect; Sessile drop; Fractal dimension; Box-counting method
Subjects:Engineering and Technology > Chemical Engineering > Nanotechnology
Divisions: Engineering and Technology > Department of Chemical Engineering
ID Code:5263
Deposited By:Hemanta Biswal
Deposited On:13 Dec 2013 15:24
Last Modified:20 Dec 2013 16:05
Supervisor(s):Paria, S

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