We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Interfacial Rigidification-Driven Fluorescence Enhancement of Novel Ultra-Fine Polyamide-Derived Carbon Quantum Dots for Quantitative Detection of Polyamide Microplastics
AI summary Read the abstract
Researchers developed tiny glowing particles made from polyamide plastic that light up when they stick to polyamide microplastics in lab tests. The particles responded within 10 minutes, worked differently with other plastic types, and accurately measured polyamide microplastics added to real water samples.
The widespread environmental presence of polyamide microplastics (PAMPs) demands rapid, selective, and mechanism-driven detection strategies. Herein, we report a “turn-on” fluorescent sensing platform based on ultra-fine polyamide-derived carbon quantum dots (PACQDs; 1.53 ± 0.72 nm), in which signal amplification is governed by interfacial rigidification. PACQDs adsorb spontaneously onto amide-rich PAMP surfaces, with molecular dynamics simulations revealing favorable adsorption energetics (−39.81 ± 2.05 kcal·mol−1) dominated by long-range electrostatic interactions and reinforced by multivalent hydrogen bonding. The fluorescence response reaches equilibrium within 10 min, follows pseudo-second-order kinetics (R2 = 0.99), and exhibits Langmuir-type saturation (R2 = 1.000), indicating a rapid and saturable PACQD–PAMP interaction. The sensor exhibits high polymer selectivity, showing strong fluorescence enhancement for PAMPs, weaker responses to polypropylene microplastics, and fluorescence quenching with polyethylene terephthalate microplastics. Interfacial binding induces restriction of intramolecular motion, evidenced by a positive shift in the Amide I band and suppression of low-frequency dipole fluctuations in simulations. This rigidification suppresses non-radiative decay, producing concentration-dependent fluorescence enhancement (R2 = 0.92). The platform achieves limits of detection/quantification of 0.06/0.14 g·L−1 and accurate quantification in real water samples (recoveries of 103–107%), highlighting excellent matrix tolerance. This work establishes interfacial rigidification as a powerful design principle for selective polymer sensing.
More Papers Like This
Phosphorescent Naphthalene-Doped Carbon Nitride Quantum Dots for Selective Detection of Polyamide Microplastics
AI summary Read the abstract
Researchers created phosphorescent quantum dots that specifically bind to polyamide microplastics through hydrogen bonding and used them to develop a selective detection method. Because phosphorescence has a longer lifetime than fluorescence, the technique avoids interference from background fluorescence in environmental samples. The method achieved 91-108% recovery rates in pond water and mud samples, enabling detection of polyamide microplastics without complex pretreatment.
Size- and Concentration-Resolved Detection of PET Microplastics in Real Water via Excitation–Emission Matrix Fluorescence Quenching of Polyamide-Derived Carbon Quantum Dots
AI summary Read the abstract
Scientists developed a new method to detect tiny plastic particles (called microplastics) in drinking water using special fluorescent dots that dim when they encounter plastic pollution. The technique works best at finding very small plastic pieces—smaller than the width of a human hair—which are hardest to detect but potentially most dangerous since they can get into our bodies more easily. This could help monitor plastic contamination in tap water and other water sources we use daily, giving us better information about our exposure to these harmful particles.
PhosphorescentNaphthalene-Doped Carbon Nitride QuantumDots for Selective Detection of Polyamide Microplastics
AI summary Read the abstract
Researchers synthesized phosphorescent naphthalene-doped carbon nitride quantum dots that selectively bind to polyamide microplastics via hydrogen bonding, enabling background-free phosphorescence imaging for specific detection of PA particles in complex environmental samples. The approach overcomes the overestimation problem caused by nonspecific fluorescent dyes by exploiting time-gated phosphorescence to eliminate background autofluorescence.
Revolutionizing microplastic detection in water through quantum dot fluorescence
AI summary Read the abstract
Researchers developed a quantum dot fluorescence-based detection system for microplastics in water, achieving sensitive and rapid identification of multiple polymer types with lower detection limits and faster analysis times than conventional spectroscopic methods.
Revolutionizing microplastic detection in water through quantum dot fluorescence
AI summary Read the abstract
Researchers developed a novel approach using carbon quantum dots to stain microplastics, enabling fluorescence-based detection in water at low cost and with simple synthesis, demonstrating high sensitivity and selectivity without the toxicity concerns of conventional fluorescent dyes.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.