Recent advancements in electrochemical sensors for the detection of vitamins, particularly vitamin D, have drawn a lot of attention due to their outstanding advantages of simplicity and high sensitivity. For the purpose of detecting vitamin D in this circumstance, recent research has focused on developing electrochemical sensors. Although there is always space for improvement, electrochemical sensors for vitamin D detection and its transformation into point‐of‐care devices have made great strides lately. For example, the development of innovative electrode materials that can increase sensitivity and selectivity continues to garner a lot of interest. New suggestions on adsorptive detections using vitamin D carriers like nanoclays or hydroxyapatite‐clay composites are being developed. These biosensors hold huge potential for the detection of cheap, disposable, and biodegradable solutions. Also, the biosensor could monitor the depletion of vitamin levels, providing a real‐time platform for the Internet of Medical Things, fifth‐generation wireless communications, and smartphone‐based electrochemical sensors. Currently, electrochemical sensors based on smartphones have been proposed to detect using various biomarkers for monitoring several changes in glucose, etc. We believe smartphone‐based electrochemical sensors and adsorptive sensing platforms provides a novel way toward point‐of‐care tests for identifying especially vitamin D deficiency and real‐time monitoring

This study presents a sustainable strategy to enhance polymer encapsulation, adsorption, and functional properties by chemically modifying sodium alginate with hydrophobic groups. Hydrophobic alginate derivatives were synthesized via a solvent-free method using hexadecyl trimethylammonium bromide, resulting in nanoparticles capable of effectively capturing non-polar compounds. To further improve compatibility within alginate-based biocomposites, halloysite nanotubes were modified through ball milling and surfactant-assisted treatments. The resulting nanocomposites (MBHA and MHHA) exhibited significantly enhanced adsorption and controlled release behavior, as confirmed by FTIR analysis of hexadecyl alginate ester conjugation. Vitamin D₃ adsorption followed the Langmuir isotherm, with high correlation coefficients (R² = 0.998 for MBHA and R² = 0.991 for MHHA), indicating monolayer adsorption on a homogenous surface. Kinetic modeling revealed that the adsorption process adhered to a pseudo-second-order model (R² = 0.9969 for MBHA and R² = 0.999 for MHHA), suggesting that chemisorption was the dominant rate-controlling mechanism. These results demonstrate the critical role of surface modification in designing nano-engineered biopolymers with superior adsorption, stability, and release profiles, offering sustainable applications in medicine, agriculture, and environmental remediation.

Humidity measurements are crucial in daily life as they influence human comfort, health, safety, and product quality. Quartz Crystal Microbalance (QCM) sensors, known for their fast response times and high sensitivity, offer a significant advantage in humidity sensing due to their ability to provide highly linear and accurate measurements. These sensors are particularly valuable because they enable real-time, precise humidity detection with minimal calibration, making them ideal for various applications. This mini-review highlights the significance of QCM sensors, focusing on the sensing layers made from nanomaterial fillers integrated into composite matrices. Typical QCM sensor surfaces are could be coated with highly conductive materials such as graphene, graphene oxide (GO), and borophene, which offer excellent humidity-sensing capabilities due to their two-dimensional allotrope structure and unique properties of carbon and boron. This review begins with a brief overview of humidity measurement principles and QCM sensor characteristics. It then explores a variety of materials used for preparing QCM sensing layers, discussing their advantages and disadvantages for humidity sensor applications. Finally, the review presents future perspectives on the development of layer-by-layer self-assembled conductive polymeric films, novel GO-based composite QCM humidity sensors, and borophene-based humidity sensors, illustrating their potential for multifunctional composites.

Son yıllarda giderek artan taleple birlikte vitaminlere olan ilgi hızla büyümektedir. Pandemi dönemiyle beraber dikkatleri üzerine çeken vitamin grubu ise D vitaminidir. D vitamini eksikliği ve yetersizliği; kanserler, kardiyovasküler hastalıklar, metabolik sendrom, enfeksiyöz ve otoimmün hastalıkların dahil olduğu pek çok kronik hastalıkla ilişkilendirilmektedir. Bu yüzden gerek maruz kalınan ve gerekse yiyeceklerdeki, ilaçlardaki ve biyolojik sıvılardaki vitaminlerin ve miktarlarının takibine duyulan ihtiyaç düzenli ölçmeyi kritik hale getirir. Vitaminlerin stabilitesinin sağlanması, kararlılığının arttırılması ve korunmasında kullanılan organik ve inorganik (nanokiller, seramikler, biyoaktif camlar ve metal oksit nanopartiküller gibi) taşıyıcıların önemi büyüktür. Bu çalışmada, D vitamini ve öneminden başlayarak, D vitamini tayininde kullanılan yöntemlere değinerek, özellikle elektrokimyasal yöntemler incelenecek, stabilite sağlayıcı inorganik nanotaşıyıcılara nanokiller özelinde değinerek, yakın gelecekteki (biyo)algılama platformları olarak umut verici olasılıklar hakkında kapsamlı incelemelerde bulunulacaktır.