PMID- 33074662 OWN - NLM STAT- MEDLINE DCOM- 20210310 LR - 20210310 IS - 1944-8252 (Electronic) IS - 1944-8244 (Linking) VI - 12 IP - 43 DP - 2020 Oct 28 TI - High-Performance Flexible Electrochemical Heavy Metal Sensor Based on Layer-by-Layer Assembly of Ti(3)C(2)T(x)/MWNTs Nanocomposites for Noninvasive Detection of Copper and Zinc Ions in Human Biofluids. PG - 48928-48937 LID - 10.1021/acsami.0c12239 [doi] AB - A flexible electrochemical heavy metal sensor based on a gold (Au) electrode modified with layer-by-layer (LBL) assembly of titanium carbide (Ti(3)C(2)T(x)) and multiwalled carbon nanotubes (MWNTs) nanocomposites was successfully fabricated for the detection of copper (Cu) and zinc (Zn) ions. An LBL drop-coating process was adopted to modify the surface of Au electrodes with Ti(3)C(2)T(x)/MWNTs treated via ultrasonication to fabricate this novel nanocomposite electrode. In addition, an in situ simultaneous deposition of "green metal" antimony (Sb) and target analytes was performed to improve the detection performance further. The electrochemical measurement was realized using square wave anodic stripping voltammetry (SWASV). Moreover, the fabricated sensor exhibited excellent detection performance under the optimal experimental conditions. The detection limits for Cu and Zn are as low as 0.1 and 1.5 ppb, respectively. Furthermore, Cu and Zn ions were successfully detected in biofluids, that is, urine and sweat, in a wide range of concentration (urine Cu: 10-500 ppb; urine Zn: 200-600 ppb; sweat Cu: 300-1500 ppb; and sweat Zn: 500-1500 ppb). The fabricated flexible sensor also possesses other advantages of ultra-repeatability and excellent stability. Thus, these advantages provide a great possibility for the noninvasive smart monitoring of heavy metals in the future. FAU - Hui, Xue AU - Hui X AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Sharifuzzaman, Md AU - Sharifuzzaman M AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Sharma, Sudeep AU - Sharma S AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Xuan, Xing AU - Xuan X AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Zhang, Shipeng AU - Zhang S AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Ko, Seok Gyu AU - Ko SG AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Yoon, Sang Hyuk AU - Yoon SH AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. FAU - Park, Jae Yeong AU - Park JY AUID- ORCID: 0000-0002-2056-5151 AD - Advanced Sensor and Energy Research (ASER) Laboratory, Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Republic of Korea. LA - eng PT - Journal Article DEP - 20201019 PL - United States TA - ACS Appl Mater Interfaces JT - ACS applied materials & interfaces JID - 101504991 RN - 0 (Ions) RN - 0 (Nanotubes, Carbon) RN - 12070-08-5 (titanium carbide) RN - 789U1901C5 (Copper) RN - D1JT611TNE (Titanium) RN - J41CSQ7QDS (Zinc) SB - IM MH - Biosensing Techniques MH - Copper/*urine MH - *Electrochemical Techniques MH - Ions/urine MH - Nanocomposites/*chemistry MH - Nanotubes, Carbon/*chemistry MH - Particle Size MH - Surface Properties MH - Sweat/chemistry MH - Titanium/*chemistry MH - Zinc/*urine OTO - NOTNLM OT - Ti3C2Tx-MXene OT - flexible sensor OT - heavy metal detection OT - human biofluids OT - layer-by-layer nanocomposites OT - multiwalled carbon nanotubes EDAT- 2020/10/20 06:00 MHDA- 2021/03/11 06:00 CRDT- 2020/10/19 17:10 PHST- 2020/10/20 06:00 [pubmed] PHST- 2021/03/11 06:00 [medline] PHST- 2020/10/19 17:10 [entrez] AID - 10.1021/acsami.0c12239 [doi] PST - ppublish SO - ACS Appl Mater Interfaces. 2020 Oct 28;12(43):48928-48937. doi: 10.1021/acsami.0c12239. Epub 2020 Oct 19.