目前發展重點

1.化學感測器之研製與應用，其方向如:生化型光學化學感測器之研製、環境檢測型光學化學感測器之研製、檢測光學異構物之光學化學感測器研製、紅外光訊號增強技術開發與感測應用、新形光學感測材料之研製與應用

2.紅外光譜儀與液相層析儀之介面研製與應用。

3.紅外光譜儀與電化學結合方法之研發與應用

4.紅外光傳輸介質之研製含實心光纖之研製與中空光導管之研發。

5.專家系統之軟體研發以及在紅外光光譜圖與層析圖譜上之應用。

• Selected Publications: 研究成果：(三年內著述)
• J. Yang, I.-F. Chen, “A novel Quality Criteria for Optimization of Chromatographic Mutlicomponent Separations”,J. Chinese Chem. Soc. 1999, 46,105-114
• J. Yang, F..-S. Lee, S.-J. Shou, “Simplex Optiimzation of PCA-Based Infrared Expert Systems”, Anal. Chem. 1999, 71, 960-967.
• J. Yang, J.-W Her, “Gas Assisted IR-ATR Probe for Detection Volatile Compounds in Aqueous Solutions”, Anal. Chem. 1999, 71, 1773-1779.
• J. Yang, J.-W Her, S.C. Chen, “Development of Infrared Hollow Waveguide As a Sensing Device for Detection of Organic Compounds in Aqueous Solutions”, Anal. Chem. 1999, 71, 3740-3746. 
• J. Yang, J.-W Her, “Purge-and-Trap ATR/IR Spectroscopic Method for the Detection of Semivolatile Aromatic Compounds in Soils”, Anal. Chem. 1999, 71, 4690-4696.
• J. Yang, “The Application of IR Optical Sensor in Detection of Organic Pollutants in Enviromental Samples”, Opto News & Letters, 1999, 81, 9-14.
• J. Yang, Y.-S. Huang, “Infrared Chemical Sensor for Detection of Aromatic Compounds uin Aqueous Solutions Uising Alkylated Polystyrene, Appl. Spec., 2000, 54, 202-208.
• J. Yang, J.-W Her, “Development of Hollow Waveguide Sampler for Detection of Chlorinated Compounds in Soils”, Anal. Chem., 2000, 72, 878-884.
• J. Yang, H.-J. Lin, “Infrared Chemical Sensor for Detection of Chlorinated Anilines in Aqueous Solution Based on ATR Waveguides Coated with Derivatized Polystyrene”, The Analyst, 2000, 125, 1605-1610.
• J. Yang, “Development and Applications of IR Optical Fibers for Chemical Analysis”, Industrial Safety & Hygiene, 2000, 33, 27-32.
• J. Yang, “Infrared Optical Sensor – the Principle and Applications”, Instruments Today, 2000, 119, 27-36.
• J. Yang, W.-C. Chen,”Combination of Porous Membrane and FT-IR Spectrometry for Detection of Chlorinated Semivolatile Compounds in Soils” Intern. J. Environ. Anal. Chem., 2001, 79, 199-216.
• J. Yang, S.-C. Chen, “Development of Electrode-less Plating Method for Silver Film Preparations for Surface-Enhanced Infrared Absorption Measurements”, Appl. Spectrosc., 2001, 55, 399-406. 
• J. Yang, F.-P. Tsai, “Comparison of SPME/Transmission IR and SPME/ATR-IR Spectroscopic Methods in Detection of Chlorianilines in Aqueous Solutions”, Appl. Spectrosc., 2001, 55, 919-926.
• J. Yang, S.-S. Tsai, “Development of HSSPME/ATR-IR Sensing Method for the Determination of Volatile Compounds in Aqueous Solutions”, Anal. Chim. Acta, 2001, 436, 31-40.
• J. Yang, C.-P. Tsui, “Detection of Chlorinated Aromatic Amines in Aqueous Solutions Based on Infrared Hollow Waveguide Sampler”, Anal. Chmi. Acta, 2001, 442, 267-275.
• J. Yang, F.-P. Tsai, “Development of SPME/RA-IR Method for Detection of Chlorinated Aromatic Amines in Aqueous Solutions”, Anal. Science, 2001, 17, 751-756.
• J. Yang, M.-L. Cheng, “Development of SPME/ATR-IR Chemical Sensor for Detection of Phenol Type of Compounds in Aqueous Solutions”, The Analyst, 2001, 126, 881-886.
• J. Yang, H.-H. Huang, “Infrared Chemical Sensor for Detection of Chlorinated Phenols in Aqueous Solution Based on a ATR Waveguide Coated with Structural Designed Polymers”, JCCS, 2001, 48, 159-166.
• J. Yang, “Optical Sensors Based on Evanescent Field – Principle and Applications”,Chemistry, 2001,59,245-251.
• J. Yang, C.-J. Lee, “Development of an Infrared Hollow Waveguide Sampler for Detection of Chlorophenols in Aqueous Solutions”, Accepted by J. of AOAC International (2001).
• J. Yang, C.-J. Lee, “Development of an Infrared Hollow Waveguide Sampler for Detection of Chlorophenols in Aqueous Solutions”, J. of AOAC International 2002, 85(1), 163-172. (SCI)
• J. Yang, P.-Y. Chen, “Development of an Infrared Hollow Waveguide Sampler for the Detection of Organic Ocmpounds in Aqueous Solutions with Limited Sample Volumes”, Anal. Sci. 2002, 18, 555-560. (SCI)
• J. Yang, S.-S. Tsai, “Cooled Internal Reflection Element for Infrared Chemical Sensing of Volatile Organic Compounds in Headspace of Aqueous Solutions”, Anal. Chim. Acta, 2002, 462, 235-244. (SCI)
• J. Yang, H. E. Yen, “Early salt stress effects on the changes of chemical composition in leaves of Mesembryanthemum crystallinum and Arabidopsis thaliana. A Fourier-Transform Infrared Spectroscopy study”, Plant Pysiology, 2002, 130, 1032-1042. (SCI)
• J. Yang, C.-J. Lee, “The Applications of Optical Sytems for Monitoring Organic Toxitants in Environmental Samples” Opto News & Letters, 2002, 95, 12-17.( 楊吉斯、李宗傑,光電量測系統在檢測環境樣品中微量毒物之應用,光訊, 2002(95)13-17 )
• J. Yang, C.-J. Lee, C.-H. Wei, “Fiber-Optic Sensors: A general Review”, JCCS, 2002, 49, 677-692. (SCI)
• J. Yang, P.-Y. Chen, “Development of Reflection-Absorption Infrared Method for the Detection of Organic Ocmpounds in Aqueous Solutions with Limited Sample Volumes”, Anal. Sci. 2002, 18, 1247-1252. (SCI)