科研之友
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摘要
Amidation reaction between PAMAM and oleic acid was explored by FTIR spectroscopy. The reacting processes under different conditions were monitored by the relative ratio of peak height. The reaction was efficient at 120 degrees C within 2 similar to 3 h. The oil latent fingerprints on the adhesive side of three different type tapes were developed by CdS/PAMAM G5.0. Good image can be obtained under irradiation of 420 nm for transparent tape, and under irradiation of 365 run for black electric tape. Compared with the effect of ordinary intensifier Rhodamine6G usually used in practice, the effect of CdS/PAMAM G5.0 is better. It has excellent performance in such aspect as fluorescence intensity, selective adsorption and less background staining after long time developing process. The fingerprint ridge is clear and legible to show the detailed characteristics. This developer also has quite satisfactory effect on old oil latent fingerprints. Two types of imaging modes could be used. It can be concluded that CdS/PAMAM G5.0 is an effective developer of oil latent Fingerprints on the adhesive side of tapes.
