二(er)(er)維導電(dian)(dian)(dian)納(na)米(mi)片因其(qi)具(ju)有(you)(you)(you)較大(da)的(de)(de)(de)(de)比表面積和(he)優異的(de)(de)(de)(de)電(dian)(dian)(dian)子(zi)性(xing)(xing)(xing)(xing)能(neng)(neng)，在(zai)(zai)(zai)電(dian)(dian)(dian)子(zi)應(ying)用(yong)(yong)(yong)中(zhong)一(yi)直處于(yu)(yu)核心地位。然而，調節導電(dian)(dian)(dian)納(na)米(mi)片的(de)(de)(de)(de)多功能(neng)(neng)性(xing)(xing)(xing)(xing)和(he)親(qin)水性(xing)(xing)(xing)(xing)仍然具(ju)有(you)(you)(you)挑(tiao)戰性(xing)(xing)(xing)(xing)。在(zai)(zai)(zai)此，本(ben)文開(kai)發了一(yi)種綠色方法，通(tong)過在(zai)(zai)(zai)聚多巴胺還(huan)原(yuan)(yuan)和(he)磺化過的(de)(de)(de)(de)氧化石墨烯(PSGO)模板上自組(zu)(zu)裝聚(3,4-乙基二(er)(er)氧噻吩)(PEDOT)，用(yong)(yong)(yong)于(yu)(yu)制(zhi)造導電(dian)(dian)(dian)且具(ju)有(you)(you)(you)氧化還(huan)原(yuan)(yuan)活(huo)性(xing)(xing)(xing)(xing)的(de)(de)(de)(de)水溶(rong)性(xing)(xing)(xing)(xing)納(na)米(mi)片。PSGO能(neng)(neng)顯著提高(gao)納(na)米(mi)片的(de)(de)(de)(de)導電(dian)(dian)(dian)性(xing)(xing)(xing)(xing)和(he)親(qin)水性(xing)(xing)(xing)(xing)。由于(yu)(yu)含有(you)(you)(you)豐(feng)富的(de)(de)(de)(de)鄰(lin)苯二(er)(er)酚基團，因此納(na)米(mi)片具(ju)有(you)(you)(you)氧化還(huan)原(yuan)(yuan)活(huo)性(xing)(xing)(xing)(xing)，可作(zuo)為開(kai)發導電(dian)(dian)(dian)性(xing)(xing)(xing)(xing)和(he)粘(zhan)合性(xing)(xing)(xing)(xing)水凝(ning)膠的(de)(de)(de)(de)通(tong)用(yong)(yong)(yong)型納(na)米(mi)載(zai)體。納(na)米(mi)片在(zai)(zai)(zai)水凝(ning)膠網絡(luo)內部創造了受(shou)貽(yi)貝(bei)(bei)激發的(de)(de)(de)(de)氧化還(huan)原(yuan)(yuan)環境，使得水凝(ning)膠具(ju)有(you)(you)(you)長(chang)期、可重復(fu)的(de)(de)(de)(de)粘(zhan)合性(xing)(xing)(xing)(xing)。同時(shi)，該水凝(ning)膠具(ju)有(you)(you)(you)生物(wu)相容(rong)性(xing)(xing)(xing)(xing)，可植入體內進行生物(wu)信(xin)號檢測。這種受(shou)貽(yi)貝(bei)(bei)啟(qi)發的(de)(de)(de)(de)2D納(na)米(mi)片組(zu)(zu)裝方法可適用(yong)(yong)(yong)于(yu)(yu)生產(chan)各種多功能(neng)(neng)納(na)米(mi)材料，在(zai)(zai)(zai)生物(wu)電(dian)(dian)(dian)子(zi)學領域具(ju)有(you)(you)(you)多種潛在(zai)(zai)(zai)應(ying)用(yong)(yong)(yong)。

Figure 1?親水(shui)性，導電性和氧化還原活性的三明治狀PSGO-PEDOT納米片的示意圖及其在水(shui)凝(ning)膠中的結合。

Figure 2?PSGO-PEDOT納米片的表征。PSGO-PEDOT納米片的a) SEM、?b) TEM圖和c) AFM圖。d)不同納米片的Zeta電位。e)不同納米片在水中24小時后的分散性。f)不同質量比E的DOT/PSGO納米片的固溶性。g) PSGO-PEDOT納米片的CV曲線，掃描速度為5 mV s^?1，循環10次。不同納米片的h)導電(dian)性和i)彈(dan)性模量。

Figure 3?PSGO-PEDOT-納米片結合水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)(PSGO-PEDOT-PAM)的(de)粘合性(xing)能。a)水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)粘附(fu)(fu)在(zai)新(xin)鮮器官、金屬、水(shui)(shui)果和陶瓷(ci)上(shang)。b)水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)在(zai)不同底(di)物上(shang)的(de)粘附(fu)(fu)強度(du)。c)水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)對(dui)皮(pi)膚組織(zhi)的(de)重復(fu)粘附(fu)(fu)強度(du)。d)水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)在(zai)儲存1、3、5天(tian)后對(dui)皮(pi)膚組織(zhi)的(de)長期粘附(fu)(fu)強度(du)。e)由貽(yi)貝激發(fa)的(de)水(shui)(shui)凝(ning)(ning)膠(jiao)(jiao)粘附(fu)(fu)。

Figure 4納米(mi)凝膠的(de)微(wei)觀(guan)結構和(he)力(li)學(xue)性(xing)能。a) PSGO-PEDOT-PAM水凝膠中形態(左)和(he)放大(da)的(de)環(huan)狀區域(yu)(右(you))。b) PSGO-PEDOT-PAM水凝膠網絡的(de)非共價相互作用(yong)。c) PSGO-PEDOT-PAM水凝膠延(yan)長(chang)至其初始長(chang)度(du)的(de)20倍并恢復。d) PSGO-PEDOT-PAM凝膠的(de)循環(huan)拉伸加載-卸載曲線。e)拉伸應力(li)-應變曲線。各(ge)種水凝膠的(de)f)強度(du)和(he)延(yan)性(xing)產(chan)物及g)斷裂能。h)對PSGO-PEDOT-PAM水凝膠進行壓縮(suo)和(he)回收(shou)。i) PSGO-PEDOT-PAM水凝膠的(de)循環(huan)壓縮(suo)加載-卸載曲線。

Figure 5?PSGO-PEDOT-PAM水凝(ning)膠(jiao)(jiao)的(de)電(dian)(dian)(dian)導(dao)率和生物電(dian)(dian)(dian)子學應用。a)水凝(ning)膠(jiao)(jiao)附著在作者(zhe)(zhe)手上，連接到(dao)一個電(dian)(dian)(dian)路(lu)上并點亮(liang)一個LED。b)各種(zhong)水凝(ning)膠(jiao)(jiao)的(de)導(dao)電(dian)(dian)(dian)性。c)最近報(bao)道的(de)導(dao)電(dian)(dian)(dian)水凝(ning)膠(jiao)(jiao)的(de)電(dian)(dian)(dian)導(dao)率，最大(da)拉(la)伸應變和導(dao)電(dian)(dian)(dian)填料的(de)含量。d) PSGO-PEDOT水凝(ning)膠(jiao)(jiao)作為(wei)(wei)電(dian)(dian)(dian)子皮(pi)膚。e)水凝(ning)膠(jiao)(jiao)作為(wei)(wei)電(dian)(dian)(dian)極(ji)粘附在作者(zhe)(zhe)背部測量肌(ji)電(dian)(dian)(dian)信(xin)號(hao)。f)水凝(ning)膠(jiao)(jiao)充當附著在作者(zhe)(zhe)頭部的(de)電(dian)(dian)(dian)極(ji)，測量作者(zhe)(zhe)生氣或(huo)大(da)笑時的(de)腦電(dian)(dian)(dian)圖。g)水凝(ning)膠(jiao)(jiao)作為(wei)(wei)心電(dian)(dian)(dian)圖電(dian)(dian)(dian)極(ji)測量作者(zhe)(zhe)的(de)心電(dian)(dian)(dian)圖信(xin)號(hao)。h)水凝(ning)膠(jiao)(jiao)作為(wei)(wei)可植入(ru)的(de)生物電(dian)(dian)(dian)極(ji)。

相(xiang)關研究成(cheng)果于2019年由西南(nan)交通大(da)學Xiong Lu課題組，發表在Adv. Funct. Mater. (//doi.org/10.1002/adfm.201907678)上。原文：Graphene Oxide-Templated Conductive and Redox-Active Nanosheets Incorporated Hydrogels for Adhesive Bioelectronics

本文來自石墨烯雜志，本文觀點不代表利特納米立場，轉載請聯系原作者。