TY - JOUR
T1 - Porous lead sulphide nanowalls structured film for ethanol detection in the short infrared regime
AU - Chaudhary, Ashok
AU - Shukla, Ravi K.
AU - Klebanov, Matvey
AU - Abdulhalim, Ibrahim
N1 - Funding Information:
Ashok Chaudhary acknowledges the Council for Higher Education, Israel, for the partial financial support in the form of fellowship. A.C. is also thankful to Dr. Jasminder Singh for fruitful discussions. The project is supported partially by the Israel Ministry of Science and Technology. The financial support of the Israel Ministry of Science via the Israel–Slovenia Binational Program under Grant No. 3-15200 is highly appreciated. The authors declare no competing financial interest.
Publisher Copyright:
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Porosity of semiconductor material has been used for various applications including gas sensing. However, the utilization of such materials for liquid sensing is still unexplored. Keeping this in mind, a highly porous structured film of lead sulphide (PbS) was engineered using a physical vapor deposition process. The fabricated PbS film was characterized for its shape and porosity using SEM, AFM, and Raman spectroscopy. Thus, the prepared PbS film was tested for various analytic aqueous media, such as ethanol, methanol, isopropanol, butanol, acetone, formaldehyde, and water for sensing. It was perceived that the prepared film was selectively responding to ethanol, while no such response was seen for the other analytic aqueous media and water. The prepared film showed a linear response for the detection of ethanol with the sensitivity of â1/40.002 transmission intensity (a.u.) per concentration of water (v/v%) at 1450 nm with a detection limit of 1.1%. Being operated in the short wavelength infrared range, this sensor can find applications in various fields, such as biofuel, medical, and organic chemistry. As compared to refractive index-based sensors which show nonmonotonic behavior with the concentration of water in ethanol, our sensor exhibits monotonic behavior over the whole range.
AB - Porosity of semiconductor material has been used for various applications including gas sensing. However, the utilization of such materials for liquid sensing is still unexplored. Keeping this in mind, a highly porous structured film of lead sulphide (PbS) was engineered using a physical vapor deposition process. The fabricated PbS film was characterized for its shape and porosity using SEM, AFM, and Raman spectroscopy. Thus, the prepared PbS film was tested for various analytic aqueous media, such as ethanol, methanol, isopropanol, butanol, acetone, formaldehyde, and water for sensing. It was perceived that the prepared film was selectively responding to ethanol, while no such response was seen for the other analytic aqueous media and water. The prepared film showed a linear response for the detection of ethanol with the sensitivity of â1/40.002 transmission intensity (a.u.) per concentration of water (v/v%) at 1450 nm with a detection limit of 1.1%. Being operated in the short wavelength infrared range, this sensor can find applications in various fields, such as biofuel, medical, and organic chemistry. As compared to refractive index-based sensors which show nonmonotonic behavior with the concentration of water in ethanol, our sensor exhibits monotonic behavior over the whole range.
KW - dielectric constant
KW - ethanol-water mixture
KW - intensity modulation scheme
KW - refractive index
KW - sensor
KW - short wavelength infrared regime
UR - http://www.scopus.com/inward/record.url?scp=85089351126&partnerID=8YFLogxK
U2 - 10.1117/1.JNP.14.026012
DO - 10.1117/1.JNP.14.026012
M3 - Article
AN - SCOPUS:85089351126
SN - 1934-2608
VL - 14
JO - Journal of Nanophotonics
JF - Journal of Nanophotonics
IS - 2
M1 - 026012
ER -