Chiral zinc oxide functionalized quartz crystal microbalance sensor for enantioselective recognition of amino acids

Recent Progress in Detecting Enantiomers in Food

“…Different types and concentrations of amino acids can influence the biological utilization and absorption of proteins in the human body. The precise analysis and sensitive detection of amino acids play a vital role not only in deepening our understanding of the mechanisms by which amino acids function in living organisms but also in various fields such as the food industry, natural products, and medicine [ 23 , 24 , 25 ]. The content and ratio of d -amino acids can reflect the quality and freshness of food products.…”

“…However, a significant challenge in utilizing QCM for amino acid enantiomer recognition lies in effectively immobilizing the chiral selectors onto the piezoelectric material. In 2022, chiral zinc oxide (ZnO) was used as a selector for constructing a QCM probe for enantioselective discrimination of amino acids ( Figure 8 ) [ 23 ].…”

“…In this review, we will delve into the latest progress made in the field of biosensors, examining the recent breakthroughs and advancements for enantiomer detection in food [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. We will discuss the principles underlying these biosensors and highlight their applications in food analysis.…”

MgAl-LDH nanoflowers as a novel sensing material for high-performance humidity sensing

“… 22–26 In the realm of sensing technology, a quartz crystal microbalance (QCM) transducer serves as a vital component, converting physical changes in the sensor into electrical signals, thus enabling accurate and sensitive detection. 27 The QCM transducer, a well-established platform for mass detection, boasts remarkable sensitivity, capable of identifying mass variations down to the sub-nanogram level, leveraging Sauerbrey's correlation to ensure precise measurements. 28 Drawing upon Sauerbrey's correlation, the QCM transducer effectively transforms the absorbed molecular mass into a frequency-sensitive signal by applying sensing substances onto its electrodes, thus enabling sensitive and accurate detection.…”