Papa Paolo, Luciani Giuseppina, Grappa Rossella, Venezia Virginia, Guerriero Ettore, Serrecchia Simone, De Cesare Fabrizio, Zampetti Emiliano, Taddei Anna Rita, Macagnano Antonella
Institute of Atmospheric Pollution Research (IIA) of National Research Council (CNR), Montelibretti, 00010 Rome, Italy.
Department of Chemical, Materials and Production Engineering (DICMaPI), University of Naples Federico II, 80125 Naples, Italy.
Sensors (Basel). 2025 Jun 4;25(11):3536. doi: 10.3390/s25113536.
A nanostructured sensing platform was developed by integrating gold-decorated lignin nanoparticles (AuLNPs) into electrospun polylactic acid (PLA) fibre mats. The composite material combines the high surface-to-volume ratio of PLA nanofibres with the chemical functionality of lignin-a polyphenolic biopolymer rich in hydroxyl and aromatic groups-enabling selective interactions with volatile amines through hydrogen bonding and Van der Waals forces. The embedded gold nanoparticles (AuNPs) further enhance the sensor's electrical conductivity and provide catalytic sites for improved analyte interaction. The sensor exhibited selective adsorption of amine vapours, showing particularly strong affinity for dimethylamine (DMA), with a limit of detection (LOD) of approximately 440 ppb. Relative humidity (RH) was found to significantly influence sensor performance by facilitating amine protonation, thus promoting interaction with the sensing surface. The developed sensor demonstrated excellent selectivity, sensitivity and reproducibility, highlighting its potential for real-time detection of amines in environmental monitoring, industrial safety and healthcare diagnostics.
通过将金修饰的木质素纳米颗粒（AuLNPs）整合到电纺聚乳酸（PLA）纤维毡中，开发了一种纳米结构传感平台。该复合材料将PLA纳米纤维的高比表面积与木质素（一种富含羟基和芳香基团的多酚生物聚合物）的化学功能相结合，能够通过氢键和范德华力与挥发性胺发生选择性相互作用。嵌入的金纳米颗粒（AuNPs）进一步提高了传感器的电导率，并为改善分析物相互作用提供了催化位点。该传感器表现出对胺蒸气的选择性吸附，对二甲胺（DMA）表现出特别强的亲和力，检测限（LOD）约为440 ppb。发现相对湿度（RH）通过促进胺的质子化来显著影响传感器性能，从而促进与传感表面的相互作用。所开发的传感器表现出优异的选择性、灵敏度和重现性，突出了其在环境监测、工业安全和医疗诊断中实时检测胺的潜力。
