PMID- 30628778 OWN - NLM STAT- MEDLINE DCOM- 20190604 LR - 20190604 IS - 1944-8252 (Electronic) IS - 1944-8244 (Linking) VI - 11 IP - 5 DP - 2019 Feb 6 TI - Protection of Nanostructures-Integrated Microneedle Biosensor Using Dissolvable Polymer Coating. PG - 4809-4819 LID - 10.1021/acsami.8b18981 [doi] AB - Real-time transdermal biosensing provides a direct route to quantify biomarkers or physiological signals of local tissues. Although microneedles (MNs) present a mini-invasive transdermal technique, integration of MNs with advanced nanostructures to enhance sensing functionalities has rarely been achieved. This is largely due to the fact that nanostructures present on MNs surface could be easily destructed due to friction during skin insertion. In this work, we reported a dissolvable polymer-coating technique to protect nanostructures-integrated MNs from mechanical destruction during MNs insertion. After penetration into the skin, the polymer could readily dissolve by interstitial fluids so that the superficial nanostructures on MNs could be re-exposed for sensing purpose. To demonstrate this technique, metallic and resin MNs decorated with vertical ZnO nanowires (vNWs) were employed as an example. Dissolvable poly(vinyl pyrrolidone) was spray-coated on the vNW-MNs surface as a protective layer, which effectively protected the superficial ZnO NWs when MNs penetrated the skin. Transdermal biosensing of H(2)O(2) biomarker in skin tissue using the polymer-protecting MNs sensor was demonstrated both ex vivo and in vivo. The results indicated that polymer coating successfully preserved the sensing functionalities of the MNs sensor after inserting into the skin, whereas the sensitivity of the MN sensor without a coating protection was significantly compromised by 3-folds. This work provided unique opportunities of protecting functional nanomodulus on MNs surface for minimally invasive transdermal biosensing. FAU - Liu, Fanmao AU - Liu F AUID- ORCID: 0000-0001-7590-8062 AD - Department of Hypertension and Vascular Disease, The First Affiliated Hospital , Sun Yat-sen University , 510080 Guangzhou , China. AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Lin, Zhihong AU - Lin Z AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Jin, Quanchang AU - Jin Q AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Wu, Qianni AU - Wu Q AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. AD - State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center , Sun Yat-sen University , 510060 Guangzhou , China. FAU - Yang, Chengduan AU - Yang C AD - Department of Hypertension and Vascular Disease, The First Affiliated Hospital , Sun Yat-sen University , 510080 Guangzhou , China. FAU - Chen, Hui-Jiuan AU - Chen HJ AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Cao, Zihan AU - Cao Z AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Lin, Di-An AU - Lin DA AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Zhou, Lingfei AU - Zhou L AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Hang, Tian AU - Hang T AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - He, Gen AU - He G AUID- ORCID: 0000-0003-1394-0053 AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. FAU - Xu, Yonghang AU - Xu Y AD - School of Materials Science and Energy Engineering , Foshan University , 528000 Foshan , China. FAU - Xia, Wenhao AU - Xia W AD - Department of Hypertension and Vascular Disease, The First Affiliated Hospital , Sun Yat-sen University , 510080 Guangzhou , China. FAU - Tao, Jun AU - Tao J AD - Department of Hypertension and Vascular Disease, The First Affiliated Hospital , Sun Yat-sen University , 510080 Guangzhou , China. FAU - Xie, Xi AU - Xie X AUID- ORCID: 0000-0001-7406-8444 AD - Department of Hypertension and Vascular Disease, The First Affiliated Hospital , Sun Yat-sen University , 510080 Guangzhou , China. AD - State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology , Sun Yat-sen University , 510006 Guangzhou , China. LA - eng PT - Journal Article DEP - 20190124 PL - United States TA - ACS Appl Mater Interfaces JT - ACS applied materials & interfaces JID - 101504991 RN - FZ989GH94E (Povidone) RN - SOI2LOH54Z (Zinc Oxide) SB - IM MH - Animals MH - Biosensing Techniques/*instrumentation MH - Equipment Design MH - Mice MH - Mice, Inbred C57BL MH - Microinjections/*instrumentation MH - Models, Biological MH - Nanowires/*chemistry MH - *Needles MH - Povidone/chemistry MH - Skin/chemistry MH - Swine MH - Zinc Oxide/chemistry OTO - NOTNLM OT - biosensing OT - dissolvable polymer coating OT - microneedle OT - nanostructure OT - transdermal biosensing EDAT- 2019/01/11 06:00 MHDA- 2019/06/05 06:00 CRDT- 2019/01/11 06:00 PHST- 2019/01/11 06:00 [pubmed] PHST- 2019/06/05 06:00 [medline] PHST- 2019/01/11 06:00 [entrez] AID - 10.1021/acsami.8b18981 [doi] PST - ppublish SO - ACS Appl Mater Interfaces. 2019 Feb 6;11(5):4809-4819. doi: 10.1021/acsami.8b18981. Epub 2019 Jan 24.