000			03240nas a2200385 a 4500
005			20260817172526.0
008			151013s2012 th u m rtt 000 a eng d
035			_a.b12157223
099		9	_aAIT Thesis no.ISE-12-55
100	1		_aDas, Anwesh
245	1	0	_aCharacterization of layer-by-layer electrostatically self-assembled thin films of chitosan capped gold and silica nanoparticles on conducting substrates and its potential application as a press sensor
260			_aPathum Thani : _bAsian Institute of Technology, _c2012
300			_a1 online resource (58 p.) : _bill.
490	1		_aThesis ; _vno. ISE-12-55
500			_aA thesissubmitted inpartial fulfilment of the requirements for the degree of Master of Engineering in Nanotechnology, School of Engineering and Technology
502			_aThesis (M. Eng.) - Asian Institute of Technology, 2012
520			_aThis dissertation focuses on the growth and characterization of chitosan capped goldand silica bi-layer thin films. Thin films have been prepared from colloidal nanoparticulate solutions of gold and silica. They were transferred onto solid substrates through Layer-by-layer dip-coating process,by dipping the substrates back and forth in the oppositely charged solutions using the concept of self-assembly of oppositely charged entities. Gold nanoparticles capped with polymer chitosan served as the positive entity and silica nanoparticles as the negative entity.Different sizes of silica nanoparticles were synthesized and characterized by varying the various reaction parameters. Effect of increasing silica particle size on bi-layer growth process was also studied.In order to achieve a good coating of the bilayerson the substrate, attachmentof the firstsilanemono-layer is very important. Role of different solvents was studied during silanization process. It was analysed and better attachment was obtained byoptimization of various parameters.Role of buffers on the growth of bi-layers wasstudied. Citrate and borate buffers have been used as acidic and basic buffers respectively.Finally, electrical characterization on Transparent conducting oxide substrates and metallic substrates were done to check the electrical behaviour of the stackedbi-layers.
650		0	_aNanoparticles
650		0	_aThin films
650		0	_aChitosan
700	1		_aDutta, Joydeep, _eChairperson
700	1		_aHornyak, Louis, _eExamination Committee
700	1		_aMohammed, Waleed S., _eExamination Committee
710	2		_aAsian Institute of Technology Fellowship, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ISE-12-55
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?qid=B03382
907			_a.b12157223 _bmnait _cz
902			_a240404
998			_b0 _c151013 _dm _ea _fz _g0
962			_a000:001:PDF:b1215722:002295:0:0:0:0:0:0 _tAbstract--AIT Thesis no.ISE-12-55 _vn
945			_lmnait
942			_c20
909			_aBarcode : 30050120845408 _bCREATED : 2015-10-13 _cRECORD # : i12860670 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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