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Illuminating invisible bloody fingerprints with a fluorescent polymer

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IMAGE: Fingerprint patterns made in blood are clearly visible on aluminum foil (left) and painted wood (right) when developed with a fluorescent polymer.
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Credit: Adapted from
2021, DOI: 10.1021/acsami.1c00710
Careful criminals usually clean a scene, wiping away visible blood and fingerprints. However, prints made with trace amounts of blood, invisible to the naked eye, could remain. Dyes can detect these hidden prints, but the dyes don t work well on certain surfaces. Now, researchers reporting in
ACS Applied Materials & Interfaces have developed a fluorescent polymer that binds to blood in a fingerprint without damaging any DNA also on the surface to create high-contrast images. ....

United States , Rongliang Ma , Yao Liu , Us Congress , Chinese Academy Of Engineering , American Chemical Society , Li Juan Fan , Chinese Academy , Major Basic Research Project , Natural Science Foundation , Jiangsu Higher Education Institutions , Priority Academic Program Development , National Key Technologies Rd Program , ஒன்றுபட்டது மாநிலங்களில் , யாவ் லியூ , எங்களுக்கு காங்கிரஸ் , சீன கலைக்கழகம் ஆஃப் பொறியியல் , அமெரிக்கன் இரசாயன சமூகம் , சீன கலைக்கழகம் , இயற்கை அறிவியல் அடித்தளம் , ப்ரையாரிடீ ப்ரோக்ர்யாம் வளர்ச்சி , தேசிய விசை தொழில்நுட்பங்கள் ர்ட் ப்ரோக்ர்யாம் ,

Double element co-doped carbon quantum dots enhance photocatalytic efficiency

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IMAGE: Photocatalytic process of phosphorus and nitrogen co-doped carbon quantum dots (PNCQDs)/TiO2 nanosheets. Due to the quantum wells created by synergy between N and P elements, photogenerated electrons can be localized.
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Credit: Authors
In a paper published in
NANO, researchers from Nanjing Tech University proposed a theory which attributes the photocatalytic efficiency enhancement of Phosphorus and Nitrogen co-doped CQDs (PNCQDs)/TiO
2 nanosheets composite photocatalyst to the quantum wells of PNCQDs.
Doped carbon quantum dots (CQDs) have been popular nanomaterials to enhance the performance of composite semiconductor photocatalyst in recent years, since their excellent optical and electronic characteristics. In the field of fluorescence, it is commonly known that double element co-doping can effectively increase the quantum yield of CQDs because of the synergy between doping elements, but the specific mechanism is sti ....

Kailai Liu , Cqds Ncqds , Chaoqun Zhu , Guodong Jiang , Fanmin Kong , Advantage Discipline Construction Foundation Of Jiangsu , Tech University , Nanjing Tech University , Methylene Blue , Advantage Discipline Construction Foundation , Priority Academic Program Development , Jiangsu Higher Education Institutions , கைலை லியூ , தொழில்நுட்பம் பல்கலைக்கழகம் , நான்ஜிங் தொழில்நுட்பம் பல்கலைக்கழகம் , ப்ரையாரிடீ ப்ரோக்ர்யாம் வளர்ச்சி ,