B.S., Shandong Normal University
M.Sc., Nanking Soil Institute, Academia Sinica
Ph.D., ETH Zurich
Chemical sensors are simple devices that can selectively and
reversible monitor a chemical species in a complex media without
sample pretreatment. They are extremely important tools for
monitoring chemical processes that occur in many areas including
the environment, industry, food production, agriculture,
biology/clinical chemistry, etc. The development of chemical
sensors for the direct monitoring of key ions, gases and
biochemical molecules in complex biological samples is a rapidly
growing avenue of research. Some of the successful sensors have
been used for the routine measurement of gases (O2, CO2 etc. ),
electrolytes (H+, Na+, K+, Ca2+, Cl-) and neutral species (glucose,
urea etc.) or for on-line monitoring during open heart surgery, or
food processing and quality control.
The thrust of my research is to investigate new chemical
materials and membrane components that can be potentially useful in
the development of highly sensitive and selective detectors for
important gases, ions and for macrosized polyions; to study the
sensing mechanisms; and to build novel instrumentation for
biologically and environmentally important species. The current
research topics are aimed to
Research Projects Available:
- Development of easy to use test cards for determination of
protamine and heparin and other related biological species using
- Development of optical sensors for urea, amino acids, ammonia,
chloride etc. biological species.
- To study other porous materials as optical sensing film
- E. Wang and M. E. Meyerhoff, "Polyanion Detection of
Macromolecular Heparin via Selective Coextraction into thin
Polymeric Films", Anal. Chem., 67, 522-527, (1995).
- B Fu, E. Bakker, J. H. Yun, E. Wang, V. C. Yang and M. E.
Meyeanhoff, "Polymer Membrane-Based Polyion Sensors: Development,
response Mechanism, and Bioanalytical Applications",
Electroanalysis, 7, 823-829, (1995).
- E. Wang, G. Wang, L. Ma, C. M. Stivanello, S. Lam and H. Patel,
"Optical Films for Protamine Detection with Lipophilic
Dichlorofluorescein Derivatives", Anal. Chim. Acta, 334, 139-147,
- Enju Wang, Leanne Ma, Lin Zhu and Christopher M. Stivanello,
"Calcium Optical Sensors Based on Lipophilic Anionic Dye and
Calcium-selective Organophosphate Ionophore or Neutral Carrier",
Analytical Letters, 30, 33-44, (1997).
- Enju Wang, Lin Zhu, Leanne Ma and Hema Petal, "Optical Sensors
for Sodium, Potassium and Ammonium Ions Based on Lipophilic Anionic
Fluorescein Dye and Neutral Carriers", Anal. Chim. Acta, 357,
- Enju Wang, Hohgmei Chen, Hema Patel, Jshwar Sadaragani, Carlos
Romero, "Influence of nonionic surfactants on the optical response
of cation selective membrane films", Anal. Chim. Acta, 397,
Dr. Enju Wang, Associate Professor
Address: St. John's University
Department of Chemistry
8000 Utopia Parkway
Jamaica, NY 11439-0001
SAH Room 333
Hours: Mon. - Thurs., 8:30 a.m. - 4:30 p. m.
Fri., 8:30 a.m. - 3:00 p.m.
Phone: (718) 990-5225
Fax: (718) 990-1876