PdRu-Decorated In₂O₃ Nanoflowers

Trace TMA Detection

Hierarchical mesoporous nanoflowers decorated with PdRu bimetallic sites enable highly selective and sensitive trimethylamine detection, ideal for rapid seafood freshness assessment in complex environments.

Zhang, Zhaohuan · Zhao, Yong · Zhu, Keheng · Zhu, Yongheng

Small 2026

Specifications

Sensitivity

{'zh': '71.9', 'en': '71.9'}

Detection limit

{'zh': '200', 'en': '200'} ppb

Optimal operating temperature

{'zh': '140', 'en': '140'} °C

Identification accuracy

{'zh': '99.3', 'en': '99.3'} %

Advantages

Lower Operating Temperature

Active-site engineering reduces the optimal operating temperature from 200°C to 140°C, lowering energy consumption and facilitating portability.

Ammonia Interference Resistant

Machine learning analysis confirms high selectivity, achieving 99.3% accuracy in identifying TMA in ammonia-containing binary mixtures.

On-Site Rapid Detection

A wireless portable sensing system enables rapid non-destructive evaluation of seafood freshness with cloud data transmission.

Applications

• Food Freshness Detection：Rapidly detect spoilage-related TMA, avoiding subjective human judgment.
• Trimethylamine Sensing：Selectively detect TMA with high sensitivity, even with ammonia interference.
• Wireless Portable Sensing Systems：Portable wireless device enables real-time freshness monitoring with cloud upload.
• Cold Chain Quality Monitoring：Non-destructive monitoring of seafood quality during cold-chain logistics.