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A novel gas sensing platform involving a hybrid of reduced graphene oxide (rGO) sheets with unsubstituted copper phthalocyanine (CuPc) nanoflowers has been explored as a room temperature ppb level chemiresistive chlorine (Cl2) sensor with a detection limit as low as 1.97 ppb.

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To investigate how central metal tunes the synergetic interactions between substituted metallo-phthalocyanine and single-walled carbon nanotubes in enhancing the gas sensing properties, a comparative study has been performed by varying the central metal ion in fluorinated metal phthalocyanines and single-walled carbon nanotube hybrid. Hybrids of metal(II)-1,2, 3,4,8,9,10,11,15,16,17,18-24,25-hexa-decafluoro-29H,31Hphthalocyanine/single-walled carbon nanotube (F 16 MPc/SWCNTs-COOH, where M ¼ Co, Zn) have been synthesized through p-p stacking interactions using the solution route. Spectroscopic (FT-IR, UV-vis, XPS and Raman), electron microscopic (TEM and FE-SEM) and TGA investigations have confirmed the successful functionalization and interaction of SWCNTs-COOH with F 16 MPc. Parts per billion (ppb) level Cl 2 -selective chemiresistive gas sensors have been fabricated on glass substrates with precoated gold electrodes by using these hybrids. The responses of various F 16 MPc/SWCNTs-COOH sensors have demonstrated the central metal ion-dependence in the sensitivity of Cl 2 .

To study the effect of synergetic interactions between metal-phthalocyanine and carbon nanotubes for gas sensing characteristics of carbon nanotubes, we have synthesized F16CoPc/MWCNTs–COOH hybrid.

In this report, Bovine Serum Albumin-based Metal–Insulator–Metal structures on Indium doped Tin Oxide coated flexible Polyethylene Terephthalate substrates with Aluminum (Al) as the top electrode have been fabricated and studied in detail. The thickness of the film was measured using a Field Emission Scanning Electron Microscope. The Fourier Transform Infrared Attenuated Total Reflectance spectrum confirms the presence of both amide-I and amide-II in the protein film. Ultraviolet-Visible Spectroscopy was performed for the absorption spectrum used to extract the optical bandgap. The surface roughness of the film was estimated by Atomic Force Microscopy. Electrical characterization of the devices gives a high capacitance density with a negative quadratic coefficient and a low dissipation factor, showing their potential for Radio Frequency/analog application. The number of dipoles (NPD) is found to be 1.01 × 1018 cm−3 with a permanent dipole moment (μ0) of 2.92 × 10−25 C m at an applied frequency of 1 MHz. The devices show high reliability resistant to degradation, studied by Constant Voltage Stressing. We also examined the performance of these flexible devices by repeated bending with different bending radii.