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Volume 7, Issue 6 (Suppl) J Nanomed Nanotechnol
ISSN: 2157-7439 JNMNT, an open access journal Nanotek 2016
December 05-07, 2016
December 05-07, 2016 Phoenix, USA
13th International Conference on
Nanotek & Expo
J Nanomed Nanotechnol 2016, 7:6 (Suppl)
Nanostructured semiconducting oxide thick films for monitoring food freshness
D. R. Patil1, Janhavi P. Talegaonkar2
1R. L. College, India
2Smt. P. K. Kotecha Mahila Mahavidyala, India.
Nowadays, people use the junk foods and readily available foods in packets available in the market, due to rush and rush in
their routine works. Also, the modern life style prefers the food packets in birthday like parties. Some foods like tomato souse,
ketchups, fruit crunches, fish, agricultural products, animal products, etc. are made the mandatory part of daily lives. Such foods may
get degraded if not stored properly. It has been observed that, the cold storage units are not available in all the shops. This is the major
problem in villages. Even though the degradation of such foods is less in amount, it affects the human health, on consumption, in
terms of various diseases, viz. vomiting, diarrhoea, indigestions, stomach disorders, physiological and psychological disorders, etc.
So, there is a strong need to detect the food freshness.The bismuth oxide powder synthesized at optimized conditions with the definite
particle size was utilized in the form of thick films for monitoring food freshness. The effect of degradation time, the type of food,
the surface nanostructure, operating temperature, long duration, long term exposure, etc. on the food freshness of the samples were
studied and discussed.
Keywords: Junk foods, Tomato Souse, Ketchup, Fish, Food Freshness, etc
Room temperature gas-sensing properties of multi-walled carbon-nanotubes functionalized with
phthalocyanine
Anshul Kumar Sharma, R.K. Bedi and Aman Mahajan
Guru Nanak Dev University, India
Multi Wall Carbon Nanotubes (MWCNTs) have attracted extensive attention in sensing and storage of gases due to their unique
one-dimensional carbon nanostructure and electrical properties. On the other hand, due to their high surface areas, central
hollow cores and the outside walls, carbon nanotubes can be used as a superior material to adsorb and storage gases, such as oxygen,
hydrogen, chlorine and nitrogen oxides. CNTs can respond to both reducing and oxidizing gases through a charge transferring
reaction with the gas molecules that changes their conductivity [A]. Multiple research groups have focused on studying and improving
the response of CNT-based sensors. Recently, in order to improve the sensing performance of these MWCNTs based sensors, many
sensing materials such as conducting polymers, metals and metal oxides have been anchored on the surface of MWCNTs and play
important roles in the improvement of the sensitivity and selectivity of the resultant gas sensors. Phthalocyanine (Pc), as an excellent
sensing material, has been extensively studied based on its high sensitivities, excellent thermal and chemical stability. The electrical
conductivity of phthalocyanine thin films can be changed by the presence of oxidizing or reducing this work, we have prepared
a hybrid material of MWCNTs-COOH and F16ZnPc. The formation of F16ZnPc/MWCNTs-COOH hybrid was confirmed by UV-
Visible, Raman and FT-IR spectroscopy. SEM, TEM and AFM studies revealed that F16ZnPc molecules were successfully anchored
on the surface of MWCNTs-COOH through π-π stacking interaction. Subsequently, a chemi-resistive sensor have been fabricated by
drop casting F16CuPc/MWCNTs-COOH hybrid onto alumina substrate. The gas sensing potential of the fabricated hybrid materials
has been tested upon exposure to different hazardous gases like NO2, NO, Cl2 and NH3 at different operating temperatures. It has been
demonstrated that F16ZnPc/MWCNTs-COOH hybrid is highly selective towards Cl 2 with minimum detection limit of 100 ppb. The
response of sensor increases linearly with increase in Cl2 concentration.The results obtained emphasize on the application of F16ZnPc/
MWCNTs-COOH hybrid material in Cl2 sensing applications.